Alpina has released full details of its newest model: the 2017 BMW Alpina B7 xDrive sedan. Based on the full-size BMW 7 Series sedan, the new Alpina B7 will be the most powerful variant available when it goes on sale this September.
Power for the 2017 BMW Alpina B7 xDrive sedan comes from a modified version of the twin-turbocharged 4.4-liter V-8 in the 750i xDrive sedan. In the B7, the engine makes 600 hp from 5,750 to 6,250 rpm and 590 lb-ft of torque at 3,000 rpm. In comparison, the 750i xDrive is rated 445 hp from 5,550 to 6,000 rpm and 480 lb-ft from 1,800 to 4,500 rpm.
Alpina claims the new B7 xDrive can reach 60 mph in 3.6 seconds and has a top speed of 193 mph (preliminary estimate). The standard BMW 750i xDrive reaches 60 mph in 4.3 seconds and is electronically limited to 130 mph, according to BMW. In our testing, a 2016 BMW 750i xDrive M Sport hit 60 mph in 4.3 seconds and finished the quarter-mile in 12.7 seconds at 111.9 mph, while a rear-drive 540-hp, 538 lb-ft 2013 BMW Alpina B7 hit 60 mph in 4.3seconds and finished the quarter-mile in 12.6 seconds at 113.6 mph.
In order to extract the extra power out of the twin-turbo 4.4-liter engine, Alpina upgraded the engine's air intake system, the intercooler, and turbochargers. Mounted in the engine's V, Alpina started with new twin-scroll turbochargers featuring larger inlet and outlet diameters, which is said to result in a quicker spool up for more low end torque and engine response. Alpina claims the engine makes 494 lb-ft by 2,000 rpm.
Alpina added larger diameter air intake ducts to increase airflow into the engine, while the air-to-water intercooler uses short charge-air intake paths to the clean air intake manifold for maximum flow. The cooling system has been modified for increased coolant flow by removing any potential bottlenecks with larger diameter hoses. Additional external water coolers and a transmission oil cooler help keep drivetrain components operating in optimal temperatures regardless of driving conditions.
Other engine upgrades to handle the 20 psi of boost and the engine's 10.0:1 compression ratio include new Mahle pistons and NGK spark plugs. The eight-speed automatic transmission with Alpina SWITCH-TRONIC features more aggressive shifts in Sport or Manual modes.
The boosted engine exhales through a new Alpina stainless steel sports exhaust system with quad exhaust tips and active exhaust valves that are controlled when the Driving Dynamic Control switch moves from Comfort to Sport mode.
For B7 xDrive duty, Alpina has retuned the 750i xDrive's air suspension system, which can be adjusted via the Dynamic Damper Control switch. The suspension also features Active Comfort Drive with Road Preview, Active Roll Stabilization, and Integral Active Steering on the rear axle. In the Alpina B7 xDrive, the air suspension lowers the car by 0.8 inch at speeds above 140 mph. At slower speeds, the suspension can also be manually lowered to lower the center of gravity, or at speeds up to 20 mph, the suspension can be raised by 0.8 inch for increased ground clearance for a total of 1.6 inches of height adjustment. Suspension settings are also adjusted via the Driving Dynamics Control switch that features several modes from a Comfort+ Mode to the sportiest Alpina Sport+ Mode.
The Integral Active Steering combines a variable ratio electric steering system at the front axles with active steering on the rear axle. At low speeds, the rear wheels steer opposite to the front axle for better turn in, and at higher speeds, the rear wheels turn with the front wheels for improved directional stability. Alpina says the high-performance engine, Integral Active Steering system, xDrive all-wheel-drive system (also retuned by Alpina), and Michelin Pilot Super Sport tires give the full-size sedan a sportier driving experience.
Mounted on 20x8.5-inch front and 20x10-inch rear alloy wheels, the tires measure 255/40 ZR20 and 295/35 ZR20 front and rear, respectively. Lightweight 21-inch forged wheels are also available and are said to save 5.5 pounds of unsprung mass per corner.
Braking duties are handled by 15.5-inch discs clamped by four-piston fixed calipers up front and 14.5-inch discs with floating calipers in the rear. The calipers are finished in blue paint.
Aesthetic updates to the Alpina B7 xDrive include new aerodynamic front and rear spoilers, larger openings in the front fascia for increased cooling, active grille shutters in the twin kidney grille, and the large diameter wheels. In addition to standard paint colors available on the BMW 7 Series, the Alpina B7 xDrive is also available in exclusive Alpina Blue Metallic and Alpina Green Metallic paint colors.
Inside, standard features on the Alpina B7 xDrive include Nappa leather and ceramic inserts, full-color head-up display, rearview camera, and BMW's latest infotainment system with navigation. Alpina wraps the sport steering wheel with Lavalina leather with blue and green stitching. The interior can also be trimmed in Piano Black lacquer or Myrtle Luxury Wood trim. Alpina badging is featured inside and out. Lastly, Alpina adds a new full-color digital instrument panel with LED lighting that switches from a blue background with red needles in Comfort Mode to blue and green drag indicators in Sport Mode.
Pricing for the 2017 BMW B7 xDrive will be announced closer to its on-sale date in September.