Before Koenigsegg came up with a 600 hp 2.0L 3-cylinder biturbo engine for the Gemera, Mercedes-AMG impressed us with its new M139 2.0L 4-cylinder turbo engine with up to 421 hp. However, Koenigsegg is yet to build the customer Gemeras, until then, the M139 remains to be the most powerful series-production 2.0L engine. The A 45 S models boast this engine. But, for those who find the 421 hp to be insufficient, Brabus has a solution.
The Brabus B45 offers 450 metric hp because of course, there’s no such thing as too much power. The stock A 45 S already looks fairly aggressive, but Brabus has tried to inject even more oomph factor with bespoke Monoblock Z 20-inch wheels, two red stripes on the grille, and Brabus height-adjustable sports springs that lower the ride height by up to 30 mm.
In true Brabus fashion, the interior retains the 3-pointed star on the AMG steering wheel. However, buyers can go for stainless scuff plates with Brabus logo, Brabus aluminum pedals, Brabus floor mats, and any other personalization requests in terms of materials and upholstery.
Besides a special map for the ECU, there’s a Brabus PowerXtra CPC auxiliary control unit and BoostXtra adapter, which are claimed to enable the engine to produce a sporty blow-off noise like a racecar. The car also gets a special duct for the air box. The engine develops 331 kW (450 hp) and 550 Nm (406 lb-ft) of torque, which is 29 hp and 50 Nm more compared to the stock A 45 S. The tuned hot hatch is claimed to sprint from 0-100 km/h (62 mph) in 3.7 seconds and on to a (limited) top speed of 270 km/h (168 mph).