A four-wheel drive, also called 4×4 or 4WD, is a two-axled vehicle drivetrain capable of providing torque to all of its wheels simultaneously. It may be full-time or on-demand, and is typically linked via a transfer case providing an additional output drive shaft and, in many instances, additional gear ranges.
The Audi A3 is a subcompact executive/small family car (C-segment) manufactured and marketed by the German automaker Audi AG since September 1996, currently in its fourth generation.
Quattro is the trademark used by the automotive brand Audi to indicate that all-wheel drive (AWD) technologies or systems are used on specific models of its automobiles.
In automotive design, a front-engine, front-wheel-drive (FWD) layout, or FF layout, places both the internal combustion engine and driven roadwheels at the front of the vehicle.
Rear-wheel drive (RWD) is a form of engine and transmission layout used in motor vehicles, in which the engine drives the rear wheels only. Until the late 20th century, rear-wheel drive was the most common configuration for cars. Most rear-wheel drive vehicles feature a longitudinally-mounted engine at the front of the car.
A drive shaft, driveshaft, driving shaft, tailshaft, propeller shaft, or Cardan shaft is a component for transmitting mechanical power, torque, and rotation, usually used to connect other components of a drivetrain that cannot be connected directly because of distance or the need to allow for relative movement between them.
An inboard brake is an automobile technology wherein the disc brakes are mounted on the chassis of the vehicle, rather than directly on the wheel hubs. Its main advantages are twofold: a reduction in the unsprung weight of the wheel hubs, as this no longer includes the brake discs and calipers; and braking torque is applied directly to the chassis, rather than being transferred to it through the suspension arms.
The powertrain layout of a motorised vehicle such as a car is often defined by the location of the engine or motors and the drive wheels.
The following outline is provided as an overview of and topical guide to automobiles:
The Audi e-tron is a series of electric and hybrid cars shown by Audi from 2009 onwards. In 2012 Audi unveiled a plug-in hybrid version, the A3 Sportback e-tron, released to retail customers in Europe in August 2014, and slated for the U.S. in 2015. A decade after the unveiling of the first e-tron concept at the 2009 International Motor Show Germany, Audi's first fully electric e-tron SUV went into production in 2019.
In automotive design, an F4, or front-engine, four-wheel drive (4WD) layout places the internal combustion engine at the front of the vehicle and drives all four roadwheels. This layout is typically chosen for better control on many surfaces, and is an important part of rally racing, as well as off-road driving. In terms of racing purposes, whether it be on-road or off-road, can be described as follows,
A team that pursues the Weak LS4WD architecture will minimize the development cost of the front-wheel drive system at the expense of having a larger rear powertrain. The Weak architecture produces a vehicle with a large powersplit between the front and rear powertrains, while the Strong architecture recommends a vehicle with more similar power and torque requirements for the front and rear.
Audi hybrid vehicles are hybrid electric vehicles created by the German carmaker, Audi. Some vehicles listed were concept vehicles, which utilised an internal combustion engine and an electric motor, and were used for research and development (R&D) for potential future use of the technology into possible series production. Audi launched its first hybrid concept car in 1989 called the Audi Duo, and was the first European company to sell a hybrid in 1997, though only in very small numbers.
Individual-wheel drive (IWD) is an automobile design in which the vehicle has an all-wheel drive powertrain that consists of multiple independent traction motors each supplying torque to a single drive wheel. The term was coined to identify electric vehicles with a four-motor layout, where each wheel is driven by an individual electric motor, as opposed to the differential drivetrain seen in conventional four wheel drive (4WD) ICE vehicles and the dual-motor 4WD design seen in many plug-in electric vehicles.
Torque vectoring is a technology employed in automobile differentials that has the ability to vary the torque to each half-shaft with an electronic system; or in rail vehicles which achieve the same using individually motored wheels. This method of power transfer has recently become popular in all-wheel drive vehicles. Some newer front-wheel drive vehicles also have a basic torque vectoring differential. As technology in the automotive industry improves, more vehicles are equipped with torque vectoring differentials. This allows for the wheels to grip the road for better launch and handling.
A drivetrain or transmission system, is the group of components that deliver mechanical power from the prime mover to the driven components. In automotive engineering, the drivetrain is the components of a motor vehicle that deliver power to the drive wheels. This excludes the engine or motor that generates the power. In marine applications, the drive shaft will drive a propeller, thruster, or waterjet rather than a drive axle, while the actual engine might be similar to an automotive engine. Other machinery, equipment and vehicles may also use a drivetrain to deliver power from the engine(s) to the driven components.
The Audi Q8 e-tron is a battery electric mid-size luxury crossover produced by Audi since 2019. The e-tron was unveiled as a concept car at the 2015 Frankfurt Motor Show. The final production version was revealed in San Francisco on 17 September 2018, publicly debuted at the 2018 Paris Motor Show, and was first delivered in May 2019. It is the company's first battery electric mass production car. The Sportback variant, a coupe style of the e-tron, entered production in 2020.
The Audi R8 is the first generation of the R8 sports car developed and manufactured by German automobile manufacturer Audi. Conceived in 2003 in concept form, the R8 was put into production in June 2006. The Type 42 is based on the Lamborghini Gallardo and shares its chassis and engine. Audi's parent company Volkswagen Group owns Lamborghini as well and components of both of the cars were shared mainly to save development costs. Production of the Type 42 ended in August 2015, following the introduction of the Type 4S at the 2015 Geneva Motor Show which was based on an entirely new platform.
The Audi Q4 e-tron is a battery electric compact luxury crossover SUV produced by Audi. It is based on Volkswagen Group's electric MEB platform and is the fourth fully-electric model in the Audi e-tron series after the Audi Q8 e-tron, e-tron GT and Q2L e-tron. Production began in March 2021, with the production version being unveiled in April 2021.
The Ford Mustang Mach-E (CX727) is a battery electric compact crossover SUV produced by Ford. Introduced on November 17, 2019, it went on sale in December 2020 as a 2021 model. The Mach-E is part of the Mustang series, with its name inspired by the Mach 1 variant of the first-generation Mustang. The car won the 2021 North American SUV of the Year Award.
The Cadillac Lyriq is a battery electric mid-size luxury crossover SUV manufactured and marketed by the Cadillac division of General Motors. As Cadillac's first fully electric vehicle, and the first GM production vehicle using the BEV3 platform, the Lyriq introduces a new version of GM's Super Cruise semi-autonomous driving system.
