X6 Engine details:

BMW X6 xDrive50i: V8 gasoline engine with Twin Turbo and
direct injection (High Precision Injection)
Capacity 4,395 cc, max output 300 kW/407 hp from 5,500–6,400 rpm,
max torque from 600 Nm/442 lb-ft from 1,750–4,500 rpm,
Acceleration [0–100 km/h] in 5.4 seconds,
Top speed 250 km/h (155 mph),
Average fuel consumption to EU standard 12.5 litres/100 km
(22.6 mpg imp),
CO2 emissions to EU standard 299 g/km.

BMW X6 xDrive35i: Straight-six gasoline engine with Twin Turbo and
direct injection (High Precision Injection)
Capacity 2,979 cc, max output 225 kW/306 hp from 5,800–6,250 rpm, max torque 400 Nm/295 lb-ft from 1,300–5,000 rpm,
Acceleration [0–100 km/h] in 6.7 seconds,
Top speed 240 km/h (149 mph),
Average fuel consumption to EU standard 10.9 litres/100 km
(25.9 mpg imp),
CO2 emissions to EU standard 262 g/km.

BMW X6 xDrive35d: Straight-six diesel engine with Variable Twin Turbo and third-generation common rail fuel injection
Capacity 2,993 cc, max output 210 kW/286 hp at 4,400 rpm,
max torque 580 Nm /427 lb-ft at 1,750–2,250 rpm,
Acceleration [0–100 km/h] in 6.9 seconds,
Top speed 236 km/h (146 mph),
Average fuel consumption to EU standard 8.3 litres/100 km
(34.0 mpg imp),
CO2 emissions to EU standard 220 g/km.

BMW X6 xDrive30d: Straight-six diesel with turbocharger and
third-generation common-rail direct fuel injection
Capacity 2,993 cc, max output 173 kW/235 hp at 4,000 rpm,
max torque 520 Nm/383 lb-ft from 2,000–2,750 rpm,
Acceleration [0–100 km/h] in 8.0 seconds
Top speed 210 km/h (130 mph),
Average fuel consumption to EU standard 8.2 litres/100 km
(34.4 mpg imp),
CO2 emissions to EU standard 217 g/km.