If there’s one thing that the Alpina B5 Bi-Turbo does not lack, that is power, with the twin-turbocharged 4.4-liter V8 engine pumping out 608 PS (600 HP / 447 kW) and 800 Nm (590 lb-ft) of torque.
However, McChip-DKR is a firm believer of more is better when it comes to the levels of power available via the right pedal, so they have launched a Stage 1 software update for the Alpina model.
Available for both the sedan and estate versions of the super executive 5er, it unleashes an extra 112 PS (110 HP / 82 kW) and 100 Nm (74 lb-ft). The result is 720 PS (710 HP / 530 kW) and 900 Nm (664 lb-ft), which allows the long-roof variant to hit a maximum speed of 328 km/h (208 mph).
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They did not say how fast it reaches 100 km/h (62 mph) from standstill, but the stock B5 needs just 3.4 seconds to get there, whereas the B5 Touring is one tenth of a second slower. As for the money part, the tuning upgrade is listed for €1,851 (equal to $2,261) on the aftermarket firm’s website.
While this tune is aimed at the pre-facelifted version of the vehicle, Alpina has launched a more modern iteration that builds on the 5-Series LCI. It sports a visual makeover, including bespoke badging, wheels and colors, and brings 621 PS (613 HP / 457 kW) and 800 Nm (590 lb-ft) into play. The 0 to 100 km/h (0-62 mph) sprint times have remained the same, despite the extra oomph, and top speed is also identical, with the sedan maxing out at 330 km/h (205 mph), and the estate running out of breath at 322 km/h (200 mph).