Alpina does not build many cars like the Alpina B10 Bi-Turbo: a 4-door sedan with 3.4 , built from 1989 to 1994 in the age of turbocharging and the first electronic engine management.
The background
The Alpina B10 Bi-Turbo is a high performance version of the BMW 5 Series (E34) executive car manufactured by German automobile manufacturer Alpina. Beginning production in 1989, the B10 Bi-Turbo was based on the 535i and received several upgrades by Alpina, being the fastest production sedan in the world at the time of its introduction. Production ended in 1994 with 507 examples produced. Developed at a cost of US$3.2 million, the B10 Bi-Turbo was introduced at the Geneva Motor Show in March 1989.
The engineering
Under the skin sits 3.4 . Kerb weight is 1695 kg. The gearbox is a 5-speed Getrag 290 manual. The layout matters: a front engine drives the rear wheels, the classic proportion — long bonnet, cabin set back — that most people picture when they picture a sports saloon or a grand tourer. The wheelbase is 2761 mm. These are manufacturer figures carried by Wikipedia and Wikidata, not road-test measurements.
Where it sits
Where it sits in Alpina's history is not in doubt: the Alpina B10 4.0 (E34) followed it; it was built at Buchloe, Germany. On a showroom list of its day it stood against the Lexus LS, the Mazda MX-5, the Subaru Legacy. Its Alpina stablemates include the Alpina B10 and the Alpina B10 (E39).
The money
There is no federal ownership record for the Alpina B10 Bi-Turbo — it predates the complaint database or was never sold in the United States — so MotorJury publishes no running-cost figure for it. For a car of this age the price is set by the collector market and the condition of the individual example, not by a formula.
Alpina B10 
Alpina B10 (E39)