Audi claims 0-62 mph (100 kph) in 4.6 seconds and 0-124 mph (200 kph) in 14.9 seconds. We don’t know if those numbers were generated in auto or the manual mode that’s said to shift 10% faster, but our German watches and the lap timer both said they are conservative. With just a hint of traction searching we saw 100 kph in about 4.4 but we saw 200 kph in a range from very high 13s to mid 14s and some publications have seen 0-200 kph in less than 14.5 so any way you look it’s a steamroller. Kept on the mat it was up to its 280 kph limiter right around 30 seconds from launch…and the “range remaining” was losing numbers 10 times as fast as tenths-of-kilometers were adding up.
Bereft of its limiter the RS6 would outrun an R8. Rumor has it an engineer got an RS6A to 205 mph but given that a 600-hp Bentley Continental GT Speed with a slightly better Cd but more weight and likely frontal area quotes 202, a low-200 figure sounds good for bench racing.
Source: Audi World