Like the standard BMW 4 Series, Alpina has given its B4 an update.
Now called the BMW Alpina B4 S Bi-Turbo, it offers 440 horsepower and 487 pound-feet of torque, beating out the standard BMW M4 that has 425 hp and 406 lb-ft. The BMW M4 however can be had with a Competition Package that boosts power to 444 hp.
Power for the B4 comes from a revised 3.0-liter straight-six turbocharged engine paired to a revamped eight-speed Sport-Automatic transmission with Alpina Switch-Tronic technology to deliver impressive dynamics and maximum comfort.
As part of the latest update, the exterior of the Alpina B4 S Bi-Turbo receives new front and rear aprons with chrome accents. Now standard are new LED headlights and fog lights while the rear tail light cluster has been redesigned with LEDs.
SEE ALSO: 2017 BMW Alpina B7 Review
Like previous B4 models, the 2018 Alpina B4 S Bi-Turbo is available in a coupe or convertible and both offer the same amount of performance. The coupe however, does the zero-to-62 mph (0-100 km/h) sprint in 4.2 seconds, while the convertible is a tick slower at 4.3 seconds.
Suspension on the Alpina models are also different compared to the standard BMW offerings. The adaptive Alpina sports suspension features electronically adjustable dampers with springs, combined with auxiliary springs and anti-roll bars.
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