35i: BMW's inline 6-cylinder 3.0 liter engine features BMW TwinPower Turbo technology, combining High Precision direct fuel injection, Double-VANOS and Valvetronic variable intake technologies, and a twin-scroll turbocharger. The result: turbo lag is virtually eliminated. Peak torque of 300 lb-ft kicks in at 1200 rpm, pushing you back in your seat all the way to 5000 rpm, and a maximum output of 300 hp is reached at 5800 rpm.
Available in: X5 sDrive35i, X5 xDrive35i
40e:BMW's plug-in hybrid iPerformance models are anchored by the award-winning 2.0-liter 4-cylinder engine that works with the lithium-ion powered eDrive motor to deliver maximum efficiency and performance. When accompanied by the 8-speed Steptronic automatic transmission, this engine produces 308 horsepower and 332 lb-ft of instant torque, enough to thrust it from 0-60 in 6.5 seconds. Whether you choose all-gas, all-electric or an intelligent mix of both, you'll be equally impressed by the EPA rated 56 MPGe it delivers.
Available in: X5 xDrive40e iPerformance
50i: This "reverse-flow" 4.4-liter, TwinPower Turbo V-8 has been updated with Valvetronic, BMW's throttle-less intake system. It works in concert with High Precision Direct Injection and two twin-scroll turbochargers, nestled on top of the engine, to deliver 445 hp and 480 lb-ft of torque.
Available in: X5 xDrive50i