Experience the ultimate BMW roadster sound showdown as the Z4 35i (E89) with its 3.0L twin-turbo inline-6 goes head-to-head ...

the BMW Z4 Roadster. The German tuner offers a power kit for the Z4 M40i range-topper that upgrades the 3.0-liter turbo straight-six to 400 PS (394 HP) and 600 Nm (443 lb-ft) of torque — an ...

Suffice it to say that the "s" at the end of the newest Z4's name stands for "sport" and is accompanied by a lot more than a cute little body kit ... BMW's venerable 300-hp, 3.0-liter twin-turbo ...

The snappily named Z4 sDrive35is (that 's' at the end is the important new bit) gets BMW's 3.0-litre twin-turbo straight-six ... Need more kit? How about lower suspension, a new sports exhaust ...

Performance is strong thanks to the 250kW/500Nm twin-turbo six cylinder. That's enough to propel the 1525kg Z4 from 0-100kmh in a scant 4.8 seconds or exactly the same as the BMW M3 coupe ... by its ...

Which roadster sounds better — the naturally aspirated 3.2L inline-6 from the BMW Z4M (E85), or the twin-turbo 3.0L in the Z4 35i (E89)? This sound battle compares both engines through cold starts, ...