Its not about cubic inches, its all about power to weight ratios and un-sprung weight for handling. Scope this out.....
Super Seven Classic Live-Axle
Seven SV
2002 Caterham 7 SLR
1997 Caterham S7 Classic
1996 Caterham Super 7 DeDion
ROCKY MOUNTAIN SPORTSCARS :: Video
ROCKY MOUNTAIN SPORTSCARS

Even a Ferrari F-40 can't touch it... I guess it wouldn't be worth wasting the gas on a big block V8.

Cost less than an SUV and gets 30+mpg to boot.