Alpina's New 540HP BMW B6 BiTurbo Coupe Warms up the Tokyo Motor Show

The B3 GT3 limited edition isn't the only Alpina making its debut at this week's 2011 Tokyo Motor Show as the boutique automaker also brought along the coupe version of its B6 BiTurbo based on the latest BMW 650i.

Alpina has taken BMW's 4.4-liter V8 turbo engine to the next level with a series of upgrades including an intercooled dual turbo system and the addition a new titanium exhaust system developed in conjunction with exhaust specialists Akrapovic, that all help to lift output to 540-horsepower at 5,500 rpm and peak torque to 700Nm (516 lb-ft).

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Tokyo Show: New BMW Alpina B3 GT3 is One Mean Green Machine

Famed BMW tuning house Alpina showed up at the 2011 Tokyo Motor Show with a world premiere, the limited edition B3 GT3 of which only 99 examples will be built, each carrying a price tag of €90.000 (approx. US$120,000) in Germany.

The B3 GT3 is based on the regular 3-Series Coupe and it uses a slightly modified version the 3.0-liter twin-turbocharged inline-six found in Alpina's B3 S Bi-Turbo sedan, coupe and touring models.

Thanks to a different exhaust system and a titanium rear silencer made by Akrapovic the three-liter unit gains 8 more ponies lifting output to 408-horses at 6,000rpm and 540Nm (398 lb-ft) of torque at 4500rpm.

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