This is the new BMW Alpina B4 S Bi-Turbo live from the Geneva Motor Show 2017. Based on the BMW 4 Series, the Alpina B4 S received more or less the same update as their 3 Series based B3 S Bi-Turbo.
Similarly, the 3.0-liter straight-six powering the 4 Series was fitted with two new in-house developed Alpina turbochargers. Together with an updated cooling system, the Alpina B4 S Bi-Turbo now delivers 440 hp and 660 Nm of torque, identical to the Alpina B3 S Bi-Turbo. The performance of both cars is nearly identical too, with the Alpina B4 S being 0.1 second faster than its ‘smaller’ brother in the 0-100 km/h sprint: 4.2 seconds is all it takes. The B4’s top speed is set at a staggering 306 km/h.
Completely in Alpina fashion, changes to the exterior are minimal. We recognize the tasteful 20-inch classic wheels immediately, which are also fitted to its neighboring sibling. At the show differences between both cars really are minimal, with the Alpina B4 S arguably being slightly more masculine.
Although the real changes happened under the car’s skin. A custom version of the ZF 8-speed automatic transmission with Alpina SWITCH TRONIC and the optional Alpina adaptive sports suspension are just two examples of the range of upgrades Alpina installed.
For more information on the BMW Alpina B4 S Bi-Turbo, click through to our earlier article. For more from the Geneva Motor Show 2017, make sure to bookmark our dedicated news channel and keep checking back.