After they enabled the 1M Coupe to produce 401 HP, German tuner Hartge has turned to the Bavarian automaker’s small crossover, the X3.
We are again talking about a power boost program applied to the X3’s 3.0-litre straight-six turbo diesel engine that raises the output from 313 HP (230 kW) and 630 Nm of torque to 362 HP (266 kW) and 730 Nm.
Thanks to this increased output the Hartge tuned BMW X3 F25 will accelerate from 80 to 180 Km/h in 14.22 seconds (4.03 seconds faster than the stock version), and from 0 to 200 Km/h in 22.75 seconds (6.15 seconds quicker).
Top speed has also increased by 4 Km/h to 248 Km/h and according to Hartge, this xDrvie35d version X3 will now require around 0.5-litres of fuel less per 100 Km than the regular version. 

Source: Hartge