Cutting-edge BMW engine technology combined with in-depth ALPINA development and engineering means the new BMW ALPINA B5 Bi-Turbo delivers on output and torque. The new 4.4 litre 8-cylinder engine with Bi-Turbo charging, Valvetronic variable valve timing and high-pressure direct fuel injection, delivers an impressive output of 447 kW (608 hp) between 5750 and 6250 rpm. A maximum torque of 800 Nm is available from only 3000 rpm.
The resulting performance figures are outstanding. Reaching 100 km/h in just 3.5 seconds (Touring 3.7 seconds), the new BMW ALPINA B5 Bi-Turbo saloon is the fastest accelerating model ever produced by ALPINA. The top speed is impressive 330 km/h (Touring 322 km/h).
The power output of this high-tech engine unfolds smoothly and with impressive emphasis across the entire rpm range. Excellent throttle response and high torque ensure that even at low engine speeds driver inputs are immediately transformed into effortless acceleration.
A number of significant technical details are responsible for the engine’s power output and performance characteristics – especially with regards to the air intake system, the intercooler and the turbocharger configuration as well as the high-performance cooling system.
The Bi-Turbo charging system comprises two specially developed turbochargers with twin-scroll turbines and large compressor wheels, which are positioned in the V of the 8-cylinder engine. This configuration ensures highly effective use of exhaust gas energy even at low engine speeds resulting in a quick power build-up and more torque at low engine speeds for overall exceptional engine response.
All components of the ALPINA air intake system - from the so called raw air intake ducts to air filter housings and clean air intake manifold - have been constructed to maximum effectiveness. Similarly, the high-performance cooling system utilises large volume radiators and optimised piping designed for maximum throughput. An indirect inter-cooler system (air/water/air) facilitates the implementation of short charge-air intake paths – with a main intercooler supplying the two large volume engine-near intercoolers. Together with additional external radiators the system ensures the thermodynamic stability of the V8 Bi-Turbo engine at all times even under the highest loads and ambient air temperatures.