Triumph TR5

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Triumph TR5
Triumph TR250
Triumph TR5 PI Front.jpg
Overview
Manufacturer Triumph Motor Company
Production1967–1968
Assembly Coventry, England
Designer Giovanni Michelotti
Body and chassis
Class Sports car
Body style Roadster
Layout Front-engine, rear-wheel-drive
Powertrain
Engine 2.5-litre straight-6
Transmission 4-speed manual, optional overdrive
Dimensions
Wheelbase 2,240 mm (88.2 in)
Length3,902 mm (153.6 in)
Width1,470 mm (57.9 in)
Height1,170 mm (46.1 in)
Kerb weight 1,030 kg (2,271 lb)
Chronology
Predecessor Triumph TR4A
Successor Triumph TR6

The Triumph TR5 is a sports car built by the Triumph Motor Company in Coventry, England, between August 1967 and September 1968. [1]

Contents

Visually similar to the Michelotti-designed TR4 roadster it was derived from, [2] the TR5 replaced Triumph's 105 bhp (78 kW) SAE Standard inline-four engine with the much more powerful Lucas mechanical fuel-injected 150 bhp (110 kW) Triumph 2.5-litre straight-6. Price pressures and tighter emissions standards in the U.S. resulted in a much less powerful carburetted version, the TR250 , being sold on the North American market.

At the time, fuel injection was uncommon in road cars. Triumph claimed in their sales brochure that it was the "First British production sports car with petrol injection". [3] [4]

TR5

The base price of a 1968 TR5 in the UK was £1,260 including taxes. Standard equipment included front disc brakes, independent rear suspension, rack and pinion steering and a four speed gearbox. Optional extras included wire wheels (£38), overdrive (£60), and a tonneau cover (£13). [4]

The TR5 was available with the "Surrey Top" hard top, a weather protection system with rigid rear section including the rear window and removable fabric section over the driver and passenger's heads.

Specifications

Taken from the UK sales brochure. [3]

Fuel tank: 51 litres (11.22 imp gal; 13.47 US gal)
Engine sump: 4.53 litres (1.00 imp gal; 1.20 US gal)
Gearbox: 1.13 litres (0.25 imp gal; 0.30 US gal)
30 to 50 mph: 7 s
40 to 60 mph: 7 s
60 to 80 mph: 8 s
 Top3rd2nd1stRev.
Ratios1.01.332.013.143.22
Overall3.454.596.9410.8311.11
PaintTrim
New WhiteBlack / Matador Red
Triumph Racing GreenBlack, Light Tan
Signal RedBlack
Jasmine YellowBlack / Light Tan
Royal BlueBlack / Shadow Blue
Valencia BlueBlack / Light Tan

Performance

According to its UK sales brochure, the fuel-injected engine could propel the TR5 from 0–50 mph (80 km/h) in 6.5 seconds, reaching a top speed of 125 mph (201 km/h). [3] Road tests at the time reported slightly different performance figures: [5]

 Sports Car World
October 1968
Cars & Car Conversions
September 1968
Motor
4 May 1968
0-50 mph (80 km/h)6.2 s6.4 s6.3 s
Top Speed118 mph (190 km/h)112 mph (180 km/h)117 mph (188 km/h)

The TR5 engine was carried forward to the TR6.

Production

The TR5 was produced in small numbers when compared with either the TR250 or the later TR6, with just 2,947 units produced; the first car was assembled on 29 August 1967 and the last on 19 September 1968. Of these, 1,161 were destined for the UK market, [6] the remainder were left hand drive and were exported to France, Belgium and Germany amongst other countries. In the first quarter of 2011 there were approximately 410 licensed and 74 SORN TR5s registered with the DVLA. [7] [8]

TR250

The Triumph TR250 was built during the same period for the North American market. Price pressures and tighter emission regulations resulted in twin Zenith-Stromberg carburettors being fitted instead of the TR5's Lucas fuel injection system. Otherwise it is nearly identical.

The TR250's engine delivered 111 bhp (81 kW), 39 bhp less than the TR5; 0–60 mph (0–97 km/h) acceleration took 10.6 seconds. [2] [9] The TR250 was also available with the Surrey Top system.

In 1968, the TR250 sold in North America for approximately $3,395, with wire wheels an $118 option, overdrive $175, and air conditioning $395. [10]

Specifications

Engine:

Turning circle: 10.1 m (33 ft)

Capacities:

Fuel tank: 51 litres (11.22 imp gal; 13.47 US gal)
Engine sump: 5.4 L (9.64 imp pt)
Gearbox: 1.13 L (2 imp pt)

Performance:

0 to 60 mph (97 km/h): 10.6 seconds [11]
0 to 100 mph (160 km/h): 39 seconds
Fuel consumption: 23.5 miles per US gallon (10.0 L/100 km; 28.2 mpgimp) [11]

Production

A total of 8,484 TR250s were built for the U.S market. [1] [12] Approximately 600 remain worldwide today, and many can now be found outside the United States, primarily in Europe.

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References

  1. 1 2 3 Piggott, Bill. Original Triumph TR. ISBN   1-870979-24-9.
  2. 1 2 TR for Triumph, Chris Harvey, ISBN   0-902280-94-5
  3. 1 2 3 Original UK sales brochure, 387/168/UK
  4. 1 2 "Motor Magazine". Vol. 133 no. 3437. 4 May 1968.Cite magazine requires |magazine= (help)
  5. Clarke, R. M. Triumph TR4, TR5, TR250. ISBN   0-948207-53-1.
  6. Richards, Michael. Triumph TR4, 5, 6 . ISBN   0-85429-816-9.
  7. "Triumph Tr5". How Many Left. Retrieved 27 June 2011.
  8. "Vehicle licensing statistics". Department of Transport. Archived from the original on 29 August 2011. Retrieved 27 June 2011.
  9. "Road & Track". December 1967.Cite magazine requires |magazine= (help)
  10. Motor Trend Magazine, April 1968
  11. 1 2 Bryant, Thomas L. (June 1977), "Driving Impressions: TR3A & TR250", Road & Track
  12. Original Triumph TR, Bill Piggott, ISBN   1-870979-24-9