There is no good answer to this question because of the variables involved. A stock DET in a 240sx is not that fast. Of course neither is a stock B16 in a Civic. The problem is no one with these setups stay stock for long. Comparing modded cars is impossible due to the variables involved. The RWD car has a advantage of course. The civic is real light. Each has potential but the 240 is a better starting point.