My colleagues have frequently questioned the need to stuff more power into BMW's small 1-series, but I find myself asking that question about the Z4. In Z4 sDrive35i form, the two-seater already has gobs of power, which is quickly delivered once the turbo(s) begin to spool. Adding the 's' to the lengthy name adds roughly 35 horsepower and 32 pound-feet of torque over an sDrive35i, bringing the total to 335 hp and 332 lb-ft, respectively. Coupled with a curb weight of 3500 pounds, this Bavarian roadster quickly turns into a tarmac-seeking missile.
If that-along with a lightning-quick dual-clutch transmission and a sport suspension that's harsh even when dialed to the "normal" setting-is what you're looking for, then this is undoubtedly your Bimmer. For me, the "meager" 300 hp and the slightly more compliant suspension tuning in the standard Z4 sDrive35i are virtually perfect.
Evan McCausland, Web Producer