Wife has an X1 35i. A tad faster than the Z4 35i at 0-60mph in 5.1 seconds vs 5.2 seconds.
All four wheels spinning and the computer keeping things stable. Great car.
The 35is has 335 horsepower compared to the 300 horsepower in the 35i. 0-60 in 4.8 seconds. And I added a Pedal Box to increase throttle.
They make a VERY solid car. Between this and the three Mini’s my wife has had I’ve never once heard a rattle.