I laughed like I always do as I dont street race but was wondering how fast that car was? I know the M series is a serious beemer I probably
would have lost but who needs to indanger others and get that ticket,
not me!

 

The new Z body style (the Z4) is not available in an M version. Maybe he just bought an M badge and slapped it on.

The previous generation Z body style (as used on the Z3) was available as the M Roadster. It had the 240 hp motor from the E36 M3. I don't know how fast the M Roadster is, because the magazines usually test the coupe versions. The E36 M3 Coupe generally tested in the high fives 0-60, and in the fourteens in the quarter mile, roughly half a second faster in each case than an ITR. I would assume that the M Roadster was heavier and slower than the E36 M3 Coupe, because convertibles usually are.

 

If this was the 3.0 liter Z4 model, its about as fast as the s2000, but has more torque due to the larger motor. If it was the newer M roadster (00-03), they come with a 3.2 liter 315hp motor, which is very quick.

 

335 Hp ?

 

it had a new car plate on the back but come to think of it it was the z3 style.

 

You're right that they had the 315 hp motor, but that version was only available in 2001-2002. (It weighed 3131 pounds, so it was reasonably quick.) The 1998-2000 version had 240 hp and there was no 2003 version.

Remember, like most VTEC cars, the S2000 has a gearing advantage that compensates for its torque disadvantage. You can read more about why this is important here. (The S2000 also weighs 300+ pounds less than the M Roadster.)

 

The M-Roadster is seriously fast.