Recently updated on March 18, 2015 at 10:56 am
Certainly anything but good family carriages (at least Mercedes E63 AMG - BMW M6) are these 4 candidates who have been properly tuned.
Mercedes E 63 AMG 4Matic (W212) Renntech Stage VIP (850 PS)
vs.
BMW M6 (F13) PP Performance Stage 2 + (730 PS)
vs.
Audi TT RS (Mk.2) Revo Technic Stage 3 (537 PS)
vs.
Chevrolet Corvette (С6) ZR1 V&S / IPS Motorsports (860 PS)