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Rear-engine design

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In automobile design, a rear-engine design layout places the engine at the rear of the vehicle. The center of gravity of the engine itself is behind the rear axle. This is not to be confused with the center of gravity of the whole vehicle, as an imbalance of such proportions would make it impossible to keep the front wheels on the ground.

Rear-engine position / Rear-wheel drive
Rear-engine position / Rear-wheel drive

Rear-engined vehicles almost always have a rear-wheel drive car layout, but some are four wheel drive. This layout has the following features:

  • Packaging: since there is no need for a transmission tunnel, the floor can be flat.[1]
  • Rear traction: having the engine located over the driven wheels increases downward pressure, which is helpful for grip on loose surfaces, although can be prone to oversteer.[2]
  • Simplicity of manufacture: the engine is near the driven wheels, and the transmission can be merged with the differential to save space.

This layout was once popular in small, inexpensive cars and light commercial vehicles. Today most car makers have abandoned the layout although it does continue in some expensive cars,[3] like the Porsche 911. It is also used in some racing car applications,[4] low-floor buses, some Type-D school buses, and microcars such as the Smart Fortwo. Some electric cars feature both rear and front motors, to drive all four wheels.[5]

Discover more about Rear-engine design related topics

Engine

Engine

An engine or motor is a machine designed to convert one or more forms of energy into mechanical energy.

Porsche 911

Porsche 911

The Porsche 911 is a two-door 2+2 high performance rear-engined sports car introduced in September 1964 by Porsche AG of Stuttgart, Germany. It has a rear-mounted flat-six engine and originally a torsion bar suspension. The car has been continuously enhanced through the years but the basic concept has remained unchanged. The engines were air-cooled until the introduction of the 996 series in 1998.

Low-floor bus

Low-floor bus

A low-floor bus is a bus or trolleybus that has no steps between the ground and the floor of the bus at one or more entrances, and low floor for part or all of the passenger cabin. A bus with a partial low floor may also be referred to as a low-entry bus or seldom a flat-floor bus in some locations.

School bus

School bus

A school bus is any type of bus owned, leased, contracted to, or operated by a school or school district. It is regularly used to transport students to and from school or school-related activities, but not including a charter bus or transit bus. Various configurations of school buses are used worldwide; the most iconic examples are the yellow school buses of the United States which are also found in other parts of the world.

Smart Fortwo

Smart Fortwo

The Smart Fortwo is a rear-engine, rear-wheel-drive, 2-passenger city car manufactured and marketed by the Smart division of the German multinational Mercedes-Benz Group. Introduced in 1998, it is now in its third generation.

Electric car

Electric car

An electric car, battery electric car, or all-electric car is an automobile that is propelled by one or more electric motors, using only energy stored in batteries. Compared to internal combustion engine (ICE) vehicles, electric cars are quieter, have no exhaust emissions, and lower emissions overall. In the United States and the European Union, as of 2020, the total cost of ownership of recent electric vehicles is cheaper than that of equivalent ICE cars, due to lower fueling and maintenance costs. Charging an electric car can be done at a variety of charging stations; these charging stations can be installed in both houses and public areas.

Notable rear-engined cars

Smart Fortwo's three-cylinder engine officially sits behind the rear axle.
Smart Fortwo's three-cylinder engine officially sits behind the rear axle.

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Benz Patent-Motorwagen

Benz Patent-Motorwagen

The Benz Patent-Motorwagen, built in 1885 by the German Carl Benz, is widely regarded as the world's first practical modern automobile and was the first car put into series production. It was patented and unveiled in 1886. The original cost of the vehicle in 1886 was 600 imperial German marks, approximately 150 US dollars.

BMW

BMW

Bayerische Motoren Werke AG, abbreviated as BMW, is a German multinational manufacturer of luxury vehicles and motorcycles headquartered in Munich, Bavaria. The corporation was founded in 1916 as a manufacturer of aircraft engines, which it produced from 1917 until 1918 and again from 1933 to 1945.

BMW 600

BMW 600

The BMW 600 is a four-seater microcar produced by the German automaker BMW from mid-1957 until November 1959. Partially based on the BMW Isetta two-seater, it was BMW's first postwar four-seater economy car. It was not a sales success, but it began the design process for its more successful successor, the BMW 700.

BMW 700

BMW 700

The BMW 700 is a small rear-engined car which was produced by BMW in various models from August 1959 to November 1965. It was the first BMW automobile with a monocoque structure. The 700 was a sales success at a time when BMW was close to financial ruin. The 700 was also successful in its class in motorsport, both in its stock form and as the basis of a racing special called the 700RS.

BMW i3

BMW i3

The BMW i3 is a B-segment, high-roof hatchback manufactured and marketed by BMW with an electric powertrain using rear-wheel drive via a single-speed transmission and an underfloor lithium-ion battery pack and an optional range-extending petrol engine. The i3 was BMW's first mass-produced zero emissions vehicle and was launched as part of BMW's electric vehicle BMW i sub-brand.

Chevrolet

Chevrolet

Chevrolet is an American automobile division of the American manufacturer General Motors (GM). Louis Chevrolet (1878–1941), Arthur Chevrolet and ousted General Motors founder William C. Durant (1861–1947) started the company on November 3, 1911 as the Chevrolet Motor Car Company. Durant used the Chevrolet Motor Car Company to acquire a controlling stake in General Motors with a reverse merger occurring on May 2, 1918, and propelled himself back to the GM presidency. After Durant's second ousting in 1919, Alfred Sloan, with his maxim "a car for every purse and purpose", would pick the Chevrolet brand to become the volume leader in the General Motors family, selling mainstream vehicles to compete with Henry Ford's Model T in 1919 and overtaking Ford as the best-selling car in the United States by 1929 with the Chevrolet International.

Chevrolet Corvair

Chevrolet Corvair

The Chevrolet Corvair is a compact car manufactured by Chevrolet for model years 1960–1969 in two generations. A response to the Volkswagen Beetle, it remains the only American-designed, mass-produced passenger car with a rear-mounted, air-cooled engine. The Corvair was manufactured and marketed in 4-door sedan, 2-door coupe, convertible, 4-door station wagon, passenger van, commercial van, and pickup truck body styles in its first generation (1960–1964) and as a 2-door coupe, convertible or 4-door hardtop in its second (1965–1969) – with a total production of approximately 1.8 million from 1960 until 1969.

Davrian

Davrian

Davrian cars were built by Davrian Developments at 65 North Street, Clapham in London, England, from 1965 to 1976, in Tregaron, Dyfed, Wales from 1976 to 1980 and Lampeter, Dyfed, from 1980 to 1983.

DMC DeLorean

DMC DeLorean

The DMC DeLorean is a rear-engine two-passenger sports car manufactured and marketed by John DeLorean's DeLorean Motor Company (DMC) for the American market from 1981 until 1983—ultimately the only car brought to market by the fledgling company. The DeLorean is sometimes referred to by its internal DMC pre-production designation, DMC-12. However, the DMC-12 name was never used in sales or marketing materials for the production model.

Fiat 500

Fiat 500

The Fiat 500 is a rear-engined, four-seat, small city car that was manufactured and marketed by Fiat Automobiles from 1957 until 1975 over a single generation in two-door saloon and two-door station wagon bodystyles.

Fiat 126

Fiat 126

The Fiat 126 is a four-passenger, rear-engine, city car manufactured and marketed by Fiat over a twenty-eight year production run from 1972 until 2000, over a single generation. Introduced by Fiat in October 1972 at the Turin Auto Show, the 126 replaced the Fiat 500, using major elements from its design. A subsequent iteration, marketed as the 126 Bis, used a horizontally oriented, water-cooled engine and featured a rear hatchback.

FMR Tg500

FMR Tg500

The FMR Tg500 was a sports car built by Fahrzeug- und Maschinenbau GmbH, Regensburg (FMR) from 1958 to 1961. Based on the Messerschmitt Kabinenroller monocoque, which otherwise was a platform for three-wheelers, the Tg500 was a four-wheeled car with a two-stroke straight-two engine. FMR had taken over production of the KR200 from Messerschmitt in 1956. While the KR200 still used the Messerschmitt name and logo, the Tg500 was badged as an FMR.

Source: "Rear-engine design", Wikipedia, Wikimedia Foundation, (2023, February 9th), https://en.wikipedia.org/wiki/Rear-engine_design.

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References
  1. ^ "1965 Chevrolet Corvair". Retrieved 16 March 2019.
  2. ^ "What Is Rear Engine Layout And Know How Is It Beneficial?". Retrieved 16 March 2019.
  3. ^ Threewitt, Cherise. "10 Affordable Rear Engine Cars". Retrieved 16 March 2019.
  4. ^ Wong, J. Y. (2008). Theory of Ground Vehicles. Hoboken NJ: Wiley. p. 560. ISBN 0-471-35461-9.
  5. ^ Adams, Eric. "The Secrets of Electric Cars and Their Motors: It's Not All About the Battery, Folks". Retrieved 16 March 2019.
  6. ^ Golseth, Andrew. "Why Is The Chevrolet Corvair Such An Overlooked Classic?". Retrieved 16 March 2019.

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