of the original Audi C5 RS 6 began in June 2002 and ended in September 2004. The second Audi C6 RS 6 was introduced at the 2007 Frankfurt Motor Show. The original RS 6 (C5) was the first Audi RS variant exported to North America, while the C6 and C7 RS 6 were only sold in Europe, with the C8 RS 6 again being offering in North America. Main rivals for the Audi RS 6 are the BMW M5 and Mercedes-Benz E 55/E 63 AMG. C5 (Typ 4B, 2002–2004) The original Audi C5 RS 6 Quattro (Typ 4B) was the top-of-the-line user of the Volkswagen Group C5 platform (1997–2004), and was initially available as a five-door five-seat Avant - Audi's name for an estate or station wagon. A four-door five-seat saloon/sedan followed shortly after the launch of the Avant. Derived from the Audi C5 S6 (itself derived from the Audi C5 A6), the RS 6 also shares the aluminium structure from the firewall and forward with the C5 A6s with V8 engines (A6 4.2 V8 Quattro, S6 saloon/Avant). It was manufactured from July 2002 through to September 2004. Official performance figures for the Avant, whilst consuming the recommended high octane 98 RON "Super Plus" unleaded petrol indicate the 0- dash would be completed in 4.6 seconds (s), reaching in 22.8 seconds (22.6 s for the saloon). Official figures state an electronically limited top speed of , although most "RS" owners report that the speed limiter is rather liberal on all RS cars, with genuine 'limited' top speeds of being possible to achieve. Using a lower octane-rated petrol, such as the standard 95 RON "Premium" unleaded will reduce the engine power output, and have logical reduction in performance. Luggage capacity, measured according to the VDA block method in the Avant ranges from , to with the rear seats folded down. For the saloon, the boot holds . C5 powertrain For the C5 RS 6 powertrain detail, the engine is an all-aluminium alloy twin-turbocharged ('biturbo'), double overhead camshaft, 5 valve per cylinder version of Audi's 4.2-litre 90° V8 petrol engine (parts code prefix: 077, identification code: BCY), developed and manufactured in Germany and the UK by quattro GmbH and Cosworth Technology (now known as MAHLE Powertrain). With the addition of the two turbochargers (one per cylinder bank), the power output of the V8 engine was increased to at 5,700 to 6,400 rpm,