High-performance convertibles are automobiles for real connoisseurs. They combine characteristics whose sole purpose is to give driver and passengers maximum pleasure. In doing so they combine the best qualities of their related species, so that they may be experienced even more directly and tangibly with the top down. The beguiling performance, powerful drive and fantastic sound of super sports cars. The elegance, dynamics and attractive lines of grand coupés. The luxury, comfort and cruising ability of refined luxury sedans. Generally speaking, qualities that have long characterised ALPINA automobiles. It therefore comes as no surprise to learn that the new ALPINA BMW B6 Bi-Turbo Convertible offers a special experience for all the senses.
DRIVE - First class performance and economy
The all-aluminium V8 power plant produces 507hp (373kW) at a moderate 5500rpm, with a maximum torque of 700Nm between 3000rpm - 4750rpm. Two turbo-chargers configured in parallel, each feeding one of the two cylinder banks, with specially developed large diameter exhaust-turbines allow this engine configuration to provide both exceptional power output and an abundance of torque over an especially broad rpm range while maintaining excellent throttle response at low rpm.
The comprehensive high-performance cooling system comprises an indirect inter-cooling system (air-to-water/water-to-air) with short intake tracts and increased inter-cooler flow. The systems excellent thermodynamic efficiency is guaranteed by a large-volume low-temperature inter-cooler radiator, as well as two water-toair inter-coolers placed close to the engine. High-performance MAHLE pistons are designed specifically to deal with temperatures and pressures associated with up to 1.0 bar charging and the engine's 9.2:1 nominal compression ratio. Altogether this results in an impressive specific output of 115.3 horsepower (85kW) per litre and a mean total compression of 20.1 bar