Even though Alpina built a total of 130 units of the B7 Turbo, this particular E24 BMW 6-Series derived classic is actually a lot rarer than that. According to the seller, this is one of just 17 catalyst-equipped B7 Turbo Coupes.

This means that its 3.4-liter six-cylinder unit produces 320 HP (325 PS) instead of its non-cat sibling’s 330 HP (335 PS). However, it has more torque at 520 Nm (383 lb-ft) at 2,400 rpm, instead of 512 Nm (377 lb-ft) at 3,000 rpm, so the magic happens at lower RPM too, aiding acceleration.

In a straight line, it could get from zero to 100 km/h (62 mph) in 5.8 seconds, before maxing out at 265 km/h (164 mph) – quick even by today’s standards.

The car’s RM Sotheby’s ad also talks about the engine’s lower compression, with a ratio of 7.45:1 instead of 8.0:1, while adding that these B7 Turbo Coupes are “very highly sought after in Alpina circles,” because of how rare they are, as well as the improved lower-end grunt.

In the end, it could fetch anywhere between €140,000 ($157,700) and €160,000 ($180,200) once it hits the auction block on April 11-12th.

Not your average 6-Series

This example is finished with a black exterior over a bright red interior. There’s also a plaque that reads ‘Autosattlerei Wenger, Exklusiv Interieur’, meaning that the cabin was re-trimmed at some point, and fitted with sports seats.

Other features include the Alpina multi-spoke wheels, a complete tool kit and first aid kit, as well as a Sony CDX-J10 CD player with a trunk-mounted disc changer.