The 2023 BMW AlpinaGB XB7 packs a 630-hp twin-turbo 4.4-liter V-8:
, but while the pre-facelift XB7 made 612 horsepower, the new version boosts that to 630 ponies. Torque stays the same at 590 pound-feet—a 37 pound-foot advantage over the M60i—and BMW says the torque peak arrives 200 rpm earlier, at 1800 rpm, and lasts until 5600 rpm. The latest X7’s V-8 also includes 48-volt hybrid assistance that improves engine responsiveness and efficiency, and Alpina’s version of the 4.4-liter also gains a unique cooling system.
The motor is paired with an eight-speed automatic transmission which includes the 48-volt starter-generator, and the XB7 has all-wheel-drive with an electronic limited-slip differential on the rear axle. BMW claims the XB7 can reach 60 mph in 3.9 seconds and run the quarter mile in 12.4 seconds, impressive figures for a vehicle with a curb weight around 6000 pounds.
BMW also says the Alpina gains reinforced torsion struts for increased rigidity, while stiffer rear-axle bushings and the M60i’s electromechanical anti-roll bars are said to reduce body roll. Rear-wheel steering, also found on the M60i, can move the rear wheels by up to 2.3 degrees in either direction. Braking power is provided by four-piston fixed Brembo calipers clamping onto 15.5-inch discs up front and floating calipers with 15.7-inch discs at the rear.