UPDATE 1/09/14:
Preliminary specs for the RC-F:
5L V8
480 HP
384 lb-ft Toque
3970 LBS
7300 RPM redline
Automatic Transmission only (No DCT)
Tires: Michelin Pilot Super Sports sized 255/35 in front, 275/35 in back.
The lexus also features a fuel saving technology borrowed from the Prius
according to MT
"A switch to electric phasing on all four cams brings greater variability and precision, and lets the engine borrow the Prius' more efficient Atkinson cycle operation during low-demand cruising conditions. So, while BMW downsized its M3/M4 engine from a 4.0-liter V-8 to a 3.0-liter I-6 and added twin turbochargers to compensate, Lexus virtually downsizes its 5.0-liter V-8 to roughly a 4.2-liter just by leaving the intake valves open for part of the compression stroke during Atkinson operation."