The B7 sedan is equipped with BMW’s twin-turbocharged 4.4 liter, all-aluminum, High Precision Direct Injection V-8 engine which has been enhanced by ALPINA and is capable of producing 500 (373kW) horsepower and 516 lb-ft (700Nm) of torque. This rear-wheel drive performance/luxury Sedan achieves 0-60 mph in 4.5 sec. With maximum torque available across an unusually broad engine range, from 3,000 to 4,750 rpm, the B7 accelerates effortlessly from virtually any speed. The two turbochargers operate in parallel, with generously-dimensioned turbine vanes measuring 44mm in diameter. Thorough exploitation of the engine’s potential was achieved by means of optimizing the indirect intercooler (air-water/water-air) with its short intake paths and flow-optimized intercooler tracts. All three intercoolers, the low-temperature intercooler integrated into the radiator package, as well as the two near-engine intercoolers are enlarged by approximately 35%, ensuring very high thermodynamic efficiency. High-performance pistons have been specified to withstand the thermodynamic forces created by a 9.2:1 compression and a maximum turbo boost of 1.0 bar. The result is a formidable specific output of 115hp (85kW) per liter, with a maximum average compression of 20.1 bar, a benchmark even amongst established sports cars. This wide power band coupled with the six-speed sport automatic transmission gives the driver remarkably high levels of power and capability in every driving situation. The ALPINA SWITCH-TRONIC transmission control offers tailored shift characteristics for every driver and situation thanks to its Sport and Manual modes. To manually select the gears of the automatic transmission, the driver may use buttons found on the back of the ALPINA-tailored steering wheel. This results in shifts which take place in a few hundred milliseconds with minimal power interruption. Ending in two polished double-tailpipes, the stainless-steel ALPINA exhaust system offers up that deep and sonorous yet not intrusive V8 sound that enthusiasts have come to expect from ALPINA.
Chassis & Suspension
The BMW ALPINA B7 builds on the state-of-the-art adaptive suspension technologies of the 7 Series, including tuned Dynamic Damping Control and Active Roll Stabilization, to the demanding requirements of a high performance sedan. Long gone are the days when a purely “hard and sporty” ride was a sought-after attribute of suspension set-ups. Striving for truly neutral handling continues to be the goal, yielding the best of what is technologically feasible. In pursuit of this goal, shorter and uniquely calibrated springs reduce front and rear ride height by 15mm and 10mm respectively. Dynamic Damping Control and Active Roll Stabilization enable the driver to select from three distinct suspension set-ups: Comfort, Normal and Sport. These are intentionally calibrated to provide noticeably different set-ups, influencing the characteristic of the dampers, the Active Roll Stabilization as well as the parameters of the power steering assist, throttle response algorithms and load-reversal damping. The Sport-Plus mode automatically shifts the Dynamic Stability Control system into Dynamic Traction Control (DTC). This allows noticeably more slip at the driven wheels and delayed intervention by the traction control system.
Together with the 21” wheel and tire combination, the suspension is at once sensitive to inputs and direct in its feel, yet free from the harshness of a purely sports-oriented suspension. The light-weight 21” wheels, with their new interpretation of the ALPINA CLASSIC wheel design, are shod with a specially selected staggered MICHELIN PS2 tire set-up: 245/35 R21 front and 285/30 R21 rear.
The result is that the BMW ALPINA B7 captures an agility associated with much smaller sedans, while preserving the ride quality associated with the BMW 7 Series.