German tuner dials up power on the BMW 550i and converts the Z4 to an 320d Efficient Dynamics-influenced diesel-sipper
The ACS5 Sport S and ACS 99d are based on the BMW 5-Series and Z4 models, respectively. The aim of the Aachen-based tuner with these two models is to create power and performance while still keeping an eye on fuel-economy and emissions.
The ACS5 Sport S is based on the BMW 550i model and dials up the noise on the 4.4 liter V8 to 540 PS (397 kW / 532 bhp) and 750 Nm (553 lb-ft) of torque from the series' 407 PS (300 kW/ 401 bhp) and 600 Nm (442 lb-ft). The 0 to 100 km/h sprint takes just 4.5 seconds and top speed is 320 km/h (198 mph).
Even with more than 130 additional horses, the ACS5 Sport S has the same fuel-economy and emissions rating as the standard 550i.
AC Schnitzer works the same tuner magic on the Z4-based 99d to which it adapts a conversion kit inspired by the 320d Efficient Dynamics edition. The 2.0 liter diesel power plant is good for 190 PS (140 kW / 188 bhp) and 420 Nm (310 lb-ft) of torque with a 0 to 100 km/h sprint time of 6.9 seconds and a top speed of 235 km/h.
Fuel-economy for the 99d is an impressive 3.8 liters/100 km (besting the 320d ED) and CO2 emissions are 99 g/km. AC Schnitzer makes those numbers by means of a 230 kg reduction in weight.
We assume they use the same modus operandi on the 550i but the press release didn't say.
More details will follow with the Geneva premiere.
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