The engine was replaced at 245,000 miles with a used engine from Japan. I am not sure which Honda engine it is, but suspect it is probably the engine used in the DX model (102hp, 98ft-lbs). But it could be the engine from the Si (125hp, 106ft-lbs), since its power output rises suddenly when it gets above 4000RPM (This RPM is a rough guesstimate since I have no tach). The 5 speed manual transmission is the stock CX transmission and I have no idea what its gear ratios are. Vehicle weight is 2.094 lbs. Cd is 0.32.