Elise models
Elise S1
All variants have Rover K-series engines.
S1 - K-series with 118bhp
S1 135 - K-series with 135bhp
S1 111S - K-series with VVC cams and 143bhp
S1 Sport 160 - K-series with 160bhp
S1 Sport 190 - K-series with 177bhp
Exige S1
Exige K with 177bhp
Elise S2
Earlier models had Rover K-series engines. Later models have Toyota engines.
S2 (inc. Sports Tourer and Race Tech option packs) - K-series with 120bhp
S2 Sport 135 - K-series with 135bhp
S2 Sport 135R - K-series with 135bhp plus track-biased suspension, wheel and tyre upgrades.
S2 111 and 111S - K-series with VVC and 156bhp
S2 111R - Toyota 2ZZ-GE engine with 189bhp
Exige S2
Exige - Toyota engine with 190BHP
Exige S - s/c Toyota engine with 220BHP
LATER:
S2 111R renamed to R
S2 S - Toyota engine with 130bhp basic spec model.
S2 SC - Supercharged Toyota engine with 220bhp.