While the BMW Z4’s M variant already had enough power at its hand, Gunther Manhart saw it fit to create a new engine that’s custom-made for the roadster. The new engine replaced the 10-cylinder engine that came as a standard to the BMW Z4.
Manhart, who has gained popularity for rebuilding existing BMW engines to give out additional power for 25 years, managed to squeeze in a 5.0 liter V10 engine into the engine bay of the Z4. Because the Z4’s engine bay is inherently narrow, it took quite a lot of time to put in the new engine in place of the old 343-horsepower engine that initially powered the BMW Z4 M model.
With the 5.0-liter V10 engine under the hood, the Manhart Z4 now delivers an impressive 550 horsepower! Because the original engine is powerful in its own right and could blaze through regulated speed limits, the Z4, as a standard, had a V-Max restriction that keeps the top speed at 250 km/h.
However, Manhart removed that for the Manhart Racing version of the BMW Z4, adding in a catalytic converter and a DME electronic unit as well. The engine is also mated to an M5 E60 6-speed manual transmission. The clutch is by Fichtel & Sachs, and includes an M5 E60 differential.
The engine’s exhaust system is comprised of four muffler tips with HJS racing catalytic converters. With the V-Max restricter removed, the Manhart Z4’s V10 engine can be brought to heel through the Bilstein B16 PSS10 coilovers.
Power is transferred from the engine to the car’s Black BBS Challenge wheels, which are mated to 8.5Jx19 ET35 235/35ZR19 at the front, and 10Jx19 ET20 285/30ZR19 in the rear.
As for performance, the V10 engine’s power allows the Z4 to zip from 0 to 100 kilometers in only 3.9 seconds! The Manhart Z4 also features an excellent power-to-weight ratio of 2.6 kg per HP, translating into a kerb weight of 1450 kilograms.