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USV 6 (120º vee)
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226 cu in
1
627 ft.lb
1
Four wheel drive
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6, sequential manual
Diesel / Electric
566.67 hp/ton
1984 lb
NCAP
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226 cu in
510 hp
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202 mph
annual
The Audi R18 e-tron Quattro is an all-wheel drive, diesel sports car prototype that will see its track debut at the 6 Hours of Spa on May 5. It is also launching a second car, the Audi R18 Ultra, that is identical to the R18 e-tron but without the hybrid powertrain. It will compete alongside the R18 e-tron Quattro at the 24 Hours of Le Mans. This two-pronged approach allows Audi to hedge its bets by running four cars at Le Mans – two hybrid and two conventional diesels.
The R18 e-tron Quattro achieves its all-wheel drive system by having the rear axle powered by the conventional diesel engine, while the front axle is powered by two electric motors. Energy is recovered from the front axle while braking and stored in a flywheel, a la Formula 1's KERS system. The power generated can be discharged to the front wheels at speeds above 120km/h. While this is happening, the 375kW (510hp) V6 diesel engine continues to operate on the rear wheels.
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