Comparison of orbital rocket engines

This page is an incomplete list of orbital rocket engine data and specifications.

Current, upcoming, and in-development rocket engines

Engine	Origin	Designer	Vehicle	Status	Use	Propellant	Power cycle	Specific impulse (s) [a]	Thrust (N) [a]	Chamber pressure (bar)	Mass (kg)	Thrust:​weight ratio [b]	Oxidizer:​fuel ratio
Aeon-R	USA	Relativity Space	Terran R	Development	1st, 2nd	CH4 / LOX	Gas generator		1,147,000
AJ10-190	USA	Aerojet	Space Shuttle, Orion, Apollo CSM	Active	Upper	N2O4 / MMH	Pressure-fed	316 [1]	26,689 [1]	8.62 [1]	118 [1]	23.08
Aquila SL	Germany	Isar Aerospace	Spectrum	Development	1st	C3H8 / LOX	Gas generator [2]		75,000
Aquila VAC	Germany	Isar Aerospace	Spectrum	Development	2nd	C3H8 / LOX	Gas generator [2]		94,000
Archimedes	New Zealand USA	Rocket Lab	Neutron	Development	1st, 2nd	CH4 / LOX	Staged, oxidizer-rich		730,000
BE-3U	USA	Blue Origin	New Glenn	Active	2nd	LH2 / LOX	Expander, open	445 [3]	211,500 [4]			>90 [4]
BE-4	USA	Blue Origin	New Glenn, Vulcan	Active [5]	1st	CH4 / LOX	Staged, oxidizer-rich	340 [3]	2,846,900 [6]	138 [3]
BE-7	USA	Blue Origin	Blue Moon	Development	1st	LH2 / LOX	Expander, open		44,500 [7]				5.5-7.1 [7]
CE-20	India	LPSC	GSLV Mk III	Active	Upper	LH2 / LOX	Gas generator	434	196,500	60.00	588	34.1	5.05
CE-7.5	India	LPSC	GSLV Mk II	Active	Upper	LH2 / LOX	Staged, fuel-rich	454 [8]	73,500	58	445	16.85
E2	USA	ABL Space Systems	RS1	Active	1st	RP-1 / LOX // Jet-A / LOX	Gas generator		53,800 [9]	64
E2 Vacuum	USA	ABL Space Systems	RS1	Active	2nd	RP-1 / LOX // Jet-A / LOX	Gas generator		57,800 [9]
Engine-2	USA	Vast	TBA	Development	1st	RP-1 / LOX	Staged, oxidizer-rich	327 [10] 290(SL)	100,000 [10]	100			2.62
Engine-2 Vacuum	USA	Vast	TBA	Development	2nd	RP-1 / LOX	Staged, oxidizer-rich	365 [10]	100,000 [10]				2.62
GEM 63	USA	Northrop Grumman	Atlas V	Active	Booster	HTPB	Solid fuel	279.06(Vac) [11]	1,662,745 [12]		49,300 with fuel
GEM 63XL	USA	Northrop Grumman	Vulcan	Active	Booster	HTPB	Solid fuel	280.3(Vac) [13]	2,025,720 [12]		53,400 with fuel
Hadley	USA	Ursa Major Technologies	Rocket 4	Active	2nd	RP-1 / LOX	Staged, oxidizer-rich		22,241(SL) [14]	62
Helix	Germany	Rocket Factory Augsburg	RFA One	Development	1st, 2nd	RP-1 / LOX	Staged, oxidizer-rich	350, 325 (SL) [15]	100,000 [15]	100 [16]
HyPER-15 [17]	South Korea	Innospace	Hanbit-Nano, -Micro, -Mini	Development	1st	Paraffin / LOX	Electric pump	292	150,000 [18]
LE-5B-3	Japan	Mitsubishi, JAXA	H-3	Active	Upper	LH2 / LOX	Expander, open	447 [19]	137,000	36.0	269	51.93	5
LE-9	Japan	Mitsubishi, JAXA	H-3	Active	1st	LH2 / LOX	Expander, open	425 [20]	1,471,000	100	2,400	62.5	5.9
Lightning 1	USA	Firefly Aerospace	Alpha	Active	2nd	RP-1 / LOX	Combustion tap-off	322 [21]	70,100 [21]
M10	Europe	Avio	Vega-E [22]	Development	Upper [22]	CH4 / LOX [22]	Expander, closed	362 [22]	98,000 [22]				3.4 [22]
Merlin 1D FT	USA	SpaceX	Falcon 9 B5, Heavy	Active	1st	RP-1 / LOX	Gas generator	311	914,000 [23] 845,000(SL) [23]	108.0 [24]	470	194.5 [23]
Merlin Vacuum 1D	USA	SpaceX	Falcon 9 B5, Heavy	Active	2nd	RP-1 / LOX	Gas generator	348 [25]	981,000 [26]				2.36
Miranda	USA	Firefly Aerospace	Antares 300 Series, MLV	Development	1st	RP-1 / LOX	Combustion tap-off	305 [27]	1,023,000 [27]
NK-33A (AJ26-62), 11Д111 / 14Д15	Soviet Union	JSC Kuznetsov	Antares 100, Soyuz-2-1v	Retired	1st	RP-1 / LOX	Staged, oxidizer-rich	331 [28] 297(SL)	1,680,000 1,510,000(SL)	145	1,222	136.8
P120	Italy France	Avio	Ariane 6, Vega-C	Active	Booster, 1st	HTPB	Solid fuel	279 [29]	4,650,000 [29]	105	153,000 with fuel [29]
Raptor [30]	USA	SpaceX	Starship	Development	1st, 2nd	CH4 / LOX	Staged, full-flow	350 [31] 327(SL) [32]	2,750,000(SL) [31]	350 [33]	1,525 [31]	184 [31]	3.6 [34]
Raptor Vacuum [30]	USA	SpaceX	Starship	Development	2nd	CH4 / LOX	Staged, full-flow	380est. [35]	>2,750,000 [31]	350 [33]	>1,525 [31]	<184 [31]	3.6 [34]
RD-0124, 14Д23	Russia	KBKhA	Soyuz-2.1b, Soyuz-2-1v, Angara	Active	2nd, 3rd	RP-1 / LOX	Staged, oxidizer-rich	359 [36]	294,300	160	520	57.7
RD-0146D	Russia	KBKhA	Angara	Development	Upper	LH2 / LOX	Expander, closed	470 [37]	68,600	59
RD-107A, 14Д22	Russia	NPO Energomash	Soyuz-FG, -2	Active	1st	RP-1 / LOX	Gas generator	320.2 [38] 263.3(SL)	1,019,892 839,449(SL)	61.2	1,090	78.53
RD-108A, 14Д21	Russia	NPO Energomash	Soyuz-FG, -2	Active	2nd	RP-1 / LOX	Gas generator	320.6 [38] 257.7(SL)	921,825 792,377(SL)	55.5	1,075	75.16
RD-171M, [c] 11Д520	Russia	NPO Energomash	Soyuz-5, Zenit-2M, -3SL, -3SLB, -3SLBF	Active	1st	RP-1 / LOX	Staged, oxidizer-rich	337.2 [39] 309.5(SL)	7,904,160 7,256,921(SL)	250	9,300	79.57
RD-180	Russia	NPO Energomash	Atlas V, III	Active	1st	RP-1 / LOX	Staged, oxidizer-rich	338.4 [40] 311.9(SL)	4,152,136 3,826,555(SL)	261.7	5,480	71.2	2.72
RD-191	Russia	NPO Energomash	Angara	Active	1st	RP-1 / LOX	Staged, oxidizer-rich	337.5 [41] 311.2(SL)	2,084,894 1,922,103(SL)	262.6	2,200	89.09
RD-276, 14Д14М	Russia	NPO Energomash	Proton-M	Active	1st	N2O4 / UDMH	Staged, oxidizer-rich	315.8 [42] 288(SL)	1,831,882 1,671,053(SL)	168.5	1,120	171.2
RD-801	Ukraine	Pivdenne/​ Pivdenmash	Mayak	Development	1st	RP-1 / LOX	Staged, oxidizer-rich	336 [43] 300.7(SL)	1,339,255 1,198,608(SL)	180	1,630		2.65
RD-809K	Ukraine	Pivdenne/​ Pivdenmash	Mayak	Development	Upper	RP-1 / LOX	Staged, oxidizer-rich	352 [43]	98,067		330		2.62
RD-810	Ukraine	Pivdenne/​ Pivdenmash	Mayak, Zenit	Development	1st	RP-1 / LOX	Staged, oxidizer-rich	335.5 [44] 299(SL)	2,104,890 1,876,149(SL)	180	2,800		2.65
RD-861K	Ukraine	Pivdenne/​ Pivdenmash	Cyclone-4M	Development	2nd	N2O4 / UDMH	Gas generator	330 [45]	77,629		207		2.41
RD-870	Ukraine	Pivdenne/​ Pivdenmash	Cyclone-4M	Development	1st	RP-1 / LOX	Staged, oxidizer-rich	340 [46] 301.5(SL)	876,715 777,667(SL)		1,353		2.684
Reaver 1	USA	Firefly Aerospace	Alpha	Active	1st	RP-1 / LOX	Combustion tap-off	265 (SL) 295.6 [21] (Vac)	184,000 [21]	75
RL10A-4-2 [47]	USA	Aerojet Rocketdyne	Atlas IIIB, V	Retired	Upper	LH2 / LOX	Expander, closed	451	99,195	42	168	60.27	5.5
RL10B-2 [47]	USA	Aerojet Rocketdyne	Delta III, IV, SLS	Active	Upper	LH2 / LOX	Expander, closed	465.5	110,093	44	301	37.27	5.88
RL10C-1 [47]	USA	Aerojet Rocketdyne	Delta III, IV, SLS, Vulcan	Active	Upper	LH2 / LOX	Expander, closed	450	101,820	44	191	54.5	5.5
RS-25	USA	Rocketdyne	Space Shuttle, SLS	Active	1st	LH2 / LOX	Staged, fuel-rich	452.3 366(SL)	2,279,000 1,860,000(SL) [48]	206.4	3,526	53.79
RS-88 LAE	USA	Rocketdyne	Boeing Starliner	Active	Upper	MMH / NTO	Gas generator		176,600(SL)
Rutherford	New Zealand USA	Rocket Lab	Electron	Active	1st	RP-1 / LOX	Electric pump	311	24,900 25,000(SL)	55	35 [49]	72.8 (SL)
Rutherford Vacuum	New Zealand USA	Rocket Lab	Electron	Active	2nd	RP-1 / LOX	Electric pump	343	25,800 [49]
S139	India	SDSC	PSLV	Active	1st	HTPB	Solid fuel	269 [50]	4,860,000	58	160,200 with fuel
S200	India	SDSC	GSLV Mk III	Active	Booster	HTPB	Solid fuel	274.5 [51]	5,150,000 [52] [53] [54]		207,000 with fuel [51]
SCE-200	India	LPSC	GSLV Mk III, ULV	Development	Upper, main	RP-1 / LOX	Staged, oxidizer-rich	335 299(SL)	2,030,000 1,820,000(SL)	180	2,700
Sirius	Australia	Gilmour Space	Eris	Development	Booster		Hybrid		150,000
SLS Solid Rocket Booster [d]	USA	Orbital ATK	SLS	Active	Booster	PBAN	Solid fuel	267	16,000,000		730,000 with fuel
SLV-1	India	Godrej & Boyce	PSLV	Active	Booster	HTPB	Solid fuel	253 [55]	502,600	43	10,800 with fuel
SRB-A3	Japan	IHI Aerospace, JAXA	H-IIA, H-IIB, Epsilon	Active	Booster	HTPB	Solid fuel	283.6 [56]	2,305,000 2,150,000(SL)	111	76,600 with fuel
TEPREL-B	Spain	PLD Space	Miura 1	Active	1st	RP-1 / LOX	Pressure-fed		30,200(SL)
TEPREL-C	Spain	PLD Space	Miura 5	Development	1st, 2nd	RP-1 / LOX	Gas generator		190,000(SL)
TQ-12 [57]	China	Landspace	ZQ-2	Active	1st	CH4 / LOX	Gas generator	284	667,000(SL)	101
Vikas (rocket engine)	India	LPSC	PSLV, GSLV, GSLV Mk III	Active	2nd, main, booster	N2O4 / UDMH	Gas generator	262	680,500–804,500 600,500–756,500 (SL)	53.0–58.5
Vinci	Europe	Snecma	Ariane 6	Active	Upper	LH2 / LOX	Expander, closed [58]	457 [59]	180,000	60	280	65.60	6.1
Vulcain 2.1	Europe	Snecma	Ariane 6	Active	1st	LH2 / LOX	Gas generator		1,324,000	120.8	2,000	66.2
YF-21B	China	AALPT	Long March 2E, 2F, 3	Active	Booster, 1st	N2O4 / UDMH	Gas generator	260.66 (SL) [60]	740,400 (SL) [60]
YF-21C	China	AALPT	Long March 2C, 2D, 3A, 3B, 3C, 4B, 4C	Active	1st	N2O4 / UDMH	Gas generator	260.7 (SL) [60]	740,400 (SL) [60]
YF-22B	China	AALPT	Long March 2E, 2F	Active	2nd	N2O4 / UDMH	Gas generator	298.0 [60]	738,400
YF-22C	China	AALPT	Long March 2C, 2D, 4B, 4C	Active	2nd	N2O4 / UDMH	Gas generator	298.0 [60]	742,040
YF-22D	China	AALPT	Long March 3	Active	2nd	N2O4 / UDMH	Gas generator	298.0 [60]	741,400
YF-22E	China	AALPT	Long March 3A, 3B, 3C	Active	2nd	N2O4 / UDMH	Gas generator	298.0 [60]	741,400
YF-25	China	AALPT	Long March 3B, 3C	Active	Booster	N2O4 / UDMH	Gas generator	260.66 (SL) [60]	740,400 (SL) [60]
YF-40	China	AALPT	Long March 4B, 4C	Active	3rd	N2O4 / UDMH	Gas generator	303	103,000
YF-50D	China	AALPT	Long March 3B, 3C, 5, 7	Active	Upper	N2O4 / UDMH	Pressure-fed	315.5	6,500
YF-73	China	AALPT	Long March 3	Active	3rd	LH2 / LOX	Gas generator	420.0	44,150
YF-75	China	AALPT	Long March 3A, 3B, 3C	Active	3rd	LH2 / LOX	Gas generator	438.0 [60]	78,450
YF-75D	China	AALPT	Long March 5	Active	2nd	LH2 / LOX	Expander, closed	442.6	88,360	41	265	34	6.0
YF-77	China	AALPT	Long March 5	Active	1st	LH2 / LOX	Gas generator	428 316.7(SL)	700,000 518,000(SL)	102	1,054	50	5.5
YF-79	China	AALPT	Long March 9	Development	3rd	LH2 / LOX	Expander, closed	455.2	250,000	70			6.0
YF-90 [61]	China	AALPT	Long March 9	Development	2nd	LH2 / LOX	Staged, fuel-rich	453	2,200,000	183	4,800	46.74	6.0
YF-100	China	AALPT	Long March 7, 5	Active	1st	RP-1 / LOX	Staged, oxidizer-rich	335.1 300(SL)	1,339,480 1,199,190 (SL)	180	1,912	64	2.6
YF-115	China	AALPT	Long March 6, 7	Active	2nd	RP-1 / LOX	Staged, oxidizer-rich	341.5	182,400	120			2.5
YF-130	China	AALPT	Long March 9	Development	1st	RP-1 / LOX	Staged, oxidizer-rich	308(SL)	~5,000,000(SL)	220	~6,500	78	2.62
Zefiro 9A	Italy	Avio	Vega-C	Active	3rd	HTPB	Solid fuel	295.2 [62]	314,000 [62]	75	11,400 with fuel
Zefiro 40	Italy	Avio	Vega-C	Active	3rd	HTPB	Solid fuel	293.5 [63]	1,304,000 [63]	115	39,206 with fuel
Zenith	USA	Stoke	Nova	Development	1st	CH4 / LOX	Staged, full-flow	~345 [64]	>444,822 [64]

Retired and canceled rocket engines

Engine	Origin	Designer	Vehicle	Status	Use	Propellant	Power cycle	Specific impulse (s) [a]	Thrust (N) [a]	Chamber pressure (bar)	Mass (kg)	Thrust:​weight ratio [e]	Oxidizer:​fuel ratio
Aeon 1	USA	Relativity Space	Terran 1	Retired	1st	CH4 / LOX	Gas generator	310	86,740(SL) [65]
Aeon 1 Vacuum	USA	Relativity Space	Terran 1	Retired	2nd	CH4 / LOX	Gas generator	360	100,085(SL) [65]
Aestus	Germany	Airbus Defence and Space	Ariane 5 G, G+, ES	Retired	Upper	N2O4 / MMH	Pressure-fed	324 [66]	30,000	11	111	27.6	1.9
Aestus II / RS-72	Germany USA	Airbus Defence and Space, Rocketdyne	Ariane 5	Retired	Upper	N2O4 / MMH	Gas generator	340 [67]	55,400	60	138	41.0	1.9
Aether	USA	Astra Space	Rocket 3.3	Retired	2nd	RP-1 / LOX [68]	Pressure-fed		3,300 [69]
AJ-60A	USA	Aerojet	Atlas V	Retired	Booster	HTPB	Solid fuel	275	1,270,000 [70]
AJ-260-2	USA	Aerojet	S-I stage replacement (proposed)	Tested, Cancelled	1st	PBAN	Solid fuel	263	26,183,755		831,345 with fuel
AR1	USA	Aerojet Rocketdyne		Cancelled	1st	RP-1 / LOX	Staged, oxidizer-rich		2,200,000(SL) [71]				2.72
Delphin	USA	Astra Space	Rocket 3.3	Retired	1st	RP-1 / LOX [68]	Electric pump		29,000 [69]	31
F-1 [f]	USA	Rocketdyne	Saturn V	Retired	1st	RP-1 / LOX	Gas generator	304 263(SL)	7,770,000 6,770,000(SL)	70	8,391	82.27	2.27
F-1A [g] [72]	USA	Rocketdyne	Saturn MLV	Cancelled	1st	RP-1 / LOX	Gas generator	303 270(SL)	8,989,000 8,007,000(SL)	80	9,015	90.6	2.27
Gamma 2	United Kingdom	Bristol Siddeley	Black Arrow	Retired	2nd	RP-1 / H2O2	Gas generator	265 [73]	68,200		173	40.22	8
Gamma 8	United Kingdom	Bristol Siddeley	Black Arrow	Retired	1st	RP-1 / H2O2	Gas generator	265 [74]	234,800	47.40	342	70.01	8
HM7A	France	Snecma	Ariane 1	Retired	3rd	LH2 / LOX	Gas generator	443 [75] 308(SL)	61,700	30	149	42.2	5
HM7B	France	Snecma	Ariane 2, 3, 4, 5 ECA	Retired	Upper	LH2 / LOX	Gas generator	446 [76] 310(SL) [77]	64,800 [76] 43,600(SL) [77]	37 [76]	165 [76]	43.25	5
J-2	USA	Rocketdyne	Saturn V, IB	Retired	2nd, 3rd	LH2 / LOX	Gas generator	421 [78] 200(SL)	1,033,100 486,200(SL)	52.6	1,438	73.18	5.5
J-2X	USA	Pratt & Whitney Rocketdyne	Ares I, Ares V, SLS (proposed)	Tested, Cancelled	Upper	LH2 / LOX	Gas generator	448 [79]	1,310,000	95	2,470	58.41	5.5–4.5
Kestrel	USA	SpaceX	Falcon 1	Retired	Upper	RP-1 / LOX	Pressure-fed	317	31,000	9.3	52	65
LE-5	Japan	Mitsubishi, NASDA	H-I	Retired	Upper	LH2 / LOX	Gas generator	450 [80]	103,000	36.0	245	42.87	5.5
LE-5A	Japan	Mitsubishi, NASDA	H-II	Retired	Upper	LH2 / LOX	Expander, open	452 [81]	121,500	40.0	242	51.19	5
LE-5B	Japan	Mitsubishi, JAXA	H-IIA, H-IIB	Active	Upper	LH2 / LOX	Expander, open	447 [19]	137,000	36.0	269	51.93	5
LE-7	Japan	Mitsubishi, NASDA	H-II	Retired	1st	LH2 / LOX	Staged, fuel-rich	446 [82]	1,078,000 843,500(SL)	127	1,714	64.13	5.9
LE-7A	Japan	Mitsubishi, JAXA	H-IIA, H-IIB	Active	1st	LH2 / LOX	Staged, fuel-rich	438 [83] 338(SL) [83]	1,098,000 870,000(SL)	120	1,800	65.9	5.9
M-1 [h]	USA	Aerojet		Cancelled	1st, 2nd?	LH2 / LOX	Gas generator	428(SL)	6,670,000		9,068	60
Merlin 1C	USA	SpaceX	Falcon 9 v1.0	Retired	1st	RP-1 / LOX	Gas generator	311 [84] 282(SL) [84]	723,000	97	470	158	2.34
Merlin Vacuum 1C	USA	SpaceX	Falcon 9 v1.0	Retired	2nd	RP-1 / LOX	Gas generator	336 [85]	413,644 [85]			92
NewtonThree	USA	Virgin Orbit	LauncherOne	Retired	Booster	RP-1 / LOX	Gas generator [86]		266,893 [87]	70
NewtonFour	USA	Virgin Orbit	LauncherOne	Retired	2nd	RP-1 / LOX	Gas generator [86]		22,241 [87]
P80	Italy France	Avio	Vega	Retired	1st	HTPB	Solid fuel	280 [88]	3,015,000 [88]	88	96,000 with fuel
P230	Europe	Avio	Ariane 5	Retired	Booster	HTPB	Solid fuel	286 [89] 259(SL)	6,996,000 5,860,000(SL)	69	269,000 with fuel [89]
RD-0120 11Д122	Soviet Union	KBKhA	Energia	Retired	1st	LH2 / LOX	Staged, fuel-rich	455 [90]	1,962,000 1,526,000(SL)	219	3,450	57.80
RD-8, 11D513	Soviet Union	Pivdenne/​ Pivdenmash	Zenit	Retired	2nd vernier	RP-1 / LOX	Staged, oxidizer-rich	342	78,450	77.47	356		2.4
RD-56 (KVD-1) 11Д56У	Russia	KBKhM	GSLV Mk I	Retired	Upper	LH2 / LOX	Staged, fuel-rich	462 [91]	69,626	55.9	282	25.17
RD-117 11Д511	Soviet Union	NPO Energomash	Soyuz-U	Retired	1st	RP-1 / LOX	Gas generator	316 [92] 253(SL)	978,000 778,648(SL)	54.2	1,100	72.18
RD-118 11Д512	Soviet Union	NPO Energomash	Soyuz-U	Retired	2nd	RP-1 / LOX	Gas generator	314 [92] 257(SL)	1,000,278 818,855(SL)	59.7	1,100	75.91
RD-170 [i] 11Д521 [93]	Soviet Union	NPO Energomash	Energia	Retired	1st	RP-1 / LOX	Staged, oxidizer-rich	337.2 309.5(SL)	7,904,160 7,256,921(SL)	250	9,300	79.57
RD-181	Russia	NPO Energomash	Antares 200	Retired	1st	RP-1 / LOX	Staged, oxidizer-rich	339.2 [94] 311.9(SL)	2,085,000 1,922,000(SL)	262.6	2,200	89
RD-193	Russia	NPO Energomash	Soyuz-2-1v	Cancelled	1st	RP-1 / LOX	Staged, oxidizer-rich	337.5 [95] 311.2(SL)	2,084,894 1,922,103(SL)		1,900	103.15
RD-264 11Д119	Soviet Union	NPO Energomash	Dnepr	Retired	1st	N2O4 / UDMH	Staged, oxidizer-rich	318 [96] 293(SL)	4,521,000	206	3,600	128.15
RD-270 [j] 8Д420	Soviet Union	NPO Energomash	UR-700 (proposed), UR-900 (proposed)	Tested, Cancelled	1st	N2O4 / UDMH	Staged, full-flow	322 [97] 301(SL)	6,710,000 6,270,000(SL)	261	3,370	189.91
RD-275 14Д14	Russia	NPO Energomash	Proton-M	Retired	1st	N2O4 / UDMH	Staged, oxidizer-rich	316 [98] 287(SL)	1,831,882 1,671,053(SL)	160.0	1,070	171.2
RD-843	Ukraine	Pivdenne/​ Pivdenmash	Vega	Retired	Upper	N2O4 / UDMH	Pressure-fed	315.5	2,452	20.4	15.93		2.0
RD-854 8D612	Soviet Union	Pivdenne/​ Pivdenmash	R-36ORB	Retired	3rd	N2O4 / UDMH	Gas generator	317	7,871	888	123, dry
RD-855 8D68M	Soviet Union	Pivdenne/​ Pivdenmash	Tsyklon-2, -3, R-36	Retired	1st vernier	N2O4 / UDMH	Gas generator	292 254(SL)	328,000 285,400(SL)	65.70	320		1.97
RD-856 8D69M	Soviet Union	Pivdenne/​ Pivdenmash	Tsyklon-2, -3 (-4), R-36	Retired	2nd vernier	N2O4 / UDMH	Gas generator	280.5	54,230	71.60	112.5		1.98
RD-861 11D25	Soviet Union	Pivdenne/​ Pivdenmash	Tsyklon-2, -3	Retired	3rd	N2O4 / UDMH	Gas generator	317	78,710	88.8	123		2.1
RD-864 15D177	Soviet Union	Pivdenne/​ Pivdenmash	R-36 (missile), Dnipro	Retired	3rd	N2O4 / UDMH	Gas generator	298–309	8,450–20,200	17–41	199		1.8
RD-869 15D300	Soviet Union	Pivdenne/​ Pivdenmash	R-36M	Retired	3rd	N2O4 / UDMH	Gas generator	302.3–313	8,580–20,470	17–41	196		1.8
RS-2200	USA	Rocketdyne	VentureStar	Cancelled	1st	LH2 / LOX	Gas generator	455 347(SL)	2,201,000 1,917,000(SL)	155		83
RS-27A	USA	Rocketdyne	Delta	Retired	1st	RP-1 / LOX	Gas generator	302 [99] 255(SL)	1,054,200	49	1,091	102.5	2.245
RS-68A [k]	USA	Rocketdyne	Delta IV, IV Heavy	Retired	1st	LH2 / LOX	Gas generator	411 [100] 362(SL)	3,558,577 3,135,996(SL)	109	6,686	54.31	5.97
RS-83	USA	Rocketdyne		Cancelled	1st	LH2 / LOX	Gas generator	446	3,300,000		6,686
RS-84	USA	Rocketdyne		Cancelled	1st	RP-1 / LOX	Staged, oxidizer rich [101]	324 305(SL)	5,036,000 4,732,000(SL)	177	6,783
Space Shuttle Solid Rocket Booster [l]	USA	Thiokol	Space Shuttle, Ares I	Retired	Booster	PBAN / APCP	Solid fuel	268	14,000,000 12,500,000(SL)		590,000 with fuel
SRB-A	Japan	IHI Aerospace, JAXA	H-IIA	Retired	Booster	HTPB	Solid fuel	280 [102]	2,250,000		76,400 with fuel
TR-106	USA	TRW		Cancelled	1st	LH2 / LOX			2,892,000(SL)
TR-107	USA	Northrop Grumman		Cancelled	1st	RP-1 / LOX			4,900,000(SL)	177
UA1207	USA	United Technologies	Titan IV	Retired	Booster	PBAN	Solid fuel	272 [103] 245(SL)	7,116,000 6,410,400(SL)		319,330 with fuel
Viking 2	France	Snecma	Ariane 1	Retired	1st	N2O4 / UDMH	Gas generator		690,000 611,200(SL)		776	90.67
Viking 2B	France	Snecma	Ariane 2, 3	Retired	1st	N2O4 / UH 25	Gas generator		643,000(SL)		776	84.5
Viking 4	France	Snecma	Ariane 1	Retired	2nd	N2O4 / UDMH	Gas generator		713,000		826	88
Viking 4B	France	Snecma	Ariane 2, 3, 4	Retired	2nd	N2O4 / UH 25	Gas generator		800,000		826	98.76
Viking 5C	France	Snecma	Ariane 4	Retired	1st	N2O4 / UH 25	Gas generator		758,000 678,000(SL)		826	93.57
Viking 6	France	Snecma	Ariane 4	Retired	Booster	N2O4 / UH 25	Gas generator		750,000		826	92.59
Vulcain HM-60	Europe	Snecma	Ariane 5	Retired	1st	LH2 / LOX	Gas generator	439 [104] 326(SL) [105]	1,113,000 [104] 773,200(SL) [105]	109 [104]	1,300 [105]	84.38
Vulcain 2	Europe	Snecma	Ariane 5	Retired	1st	LH2 / LOX	Gas generator	429 [106] 318(SL) [107]	1,359,000 [106] 939,500(SL) [107]	117.3 [106]	1,800 [106]	77.04
Waxwing	United Kingdom	Bristol Aerojet	Black Arrow	Retired	Upper		Solid fuel	278 [108] 245(SL)	29,400 25,900(SL)		87	34.48
XRS-2200	USA	Rocketdyne	X-33	Cancelled	1st	LH2 / LOX	Gas generator	439 339(SL)	1,184,000 909,000(SL)	58
Zefiro 23	Italy	Avio	Vega	Retired	2nd	HTPB	Solid fuel	287.5 [109]	1,122,000 [109]	94	25,935 with fuel

See also

• Comparison of orbital launch systems
• Comparison of orbital launchers families
• Comparison of crewed space vehicles
• Comparison of space station cargo vehicles
• Comparison of solid-fuelled orbital launch systems
• List of space launch system designs
• List of orbital launch systems

Notes

1. At sea level if denoted SL, in vacuum otherwise
2. Weight is calculated at standard gravity.
3. Most powerful multi-chamber rocket engine in the world
4. Largest, most powerful solid-fuel rocket motor ever built
5. Weight is calculated at standard gravity.
6. Most powerful single-chamber liquid-fueled rocket engine ever developed
7. Tested but never flown
8. Most powerful Hydrogen-fueled engine ever conceived
9. World's most powerful liquid fueled rocket engine
10. Tested but never flown
11. Most powerful hydrogen-fueled engine ever flown
12. Largest solid-fuel rocket motor ever flown, and the first to be used for primary propulsion on human spaceflight missions

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