Audi RS4 The Audi RS4 is the top tier and highest performing version of the Audi A4 range (above the Audi S4) of cars. It is a sports-focused compact executive car produced by quattro GmbH, in limited numbers, for German car manufacturer - Audi AG, part of the larger Volkswagen Group. It slots above the Audi S4 as the fastest, most sports-focused model based on the A4's "B" chassis."RS" initials stand for RennSport (from (German), literally translated to "racing sport", actually meaning "motor sport"), and is Audi's highest trim level, positioned above the "S" model specification of Audi's regular model line-up. Performance Data Base Engine Size: 4.2 liters Base Engine Type: V8 Horsepower: 420 hp Max Horsepower: 7500 rpm Torque: 317 ft-lbs. Max Torque: 6000 rpm Drive Type: AWD Maximum speed: 155mph (governed) acceleration 0-60mph: 4.50 s. 1/4 mile: 13.10 s. Audi R8 The Audi R8 is a mid-engined sports car introduced by the German automaker Audi in 2006, appearing at auto shows and events all over the world. The R8 is based on the Audi Space Frame, which contributes to the car's relatively light weight.To produce the R8, seventy workers fit 5,000 unique parts by hand. The factory produces 15 cars a day. It is built by Audi AG's wholly owned private subsidiary company, quattro GmbH.As Audi AG owns Lamborghini (Automobili Lamborghini S.p.A.), very little of the R8 is shared with the Lamborghini Gallardo, including the transmission.The R8 is made distinct by its exterior styling, cabin, engine, and pricing. Performance Data Base Engine Size: 4.2 or 5.2 liters Base Engine Type: V8 or v10 Horsepower: 420 or 518 hp Max Horsepower: 7800 rpm Torque: 317 or 391 ft-lbs. Max Torque: 7,8000 or 8,000 rpm Drive Type: AWD Maximum speed: 187mph or 196mph (governed) 0-62mph: 4.4s. or 3.9s. 1/4 mile: 12.5s. Copyright©2009 Racing Logistics