I'm not aware of any E31 8's without leather interiors. Maybe in Europe, all the Northern American examples came with leather. Crazy to get one ordered from BMW Individual without leather for a $90,000 car.
Here is my '91 850i: With some modifications to the suspension (K-Bar sway bars, ACS Suspension, 18" Konigs with low profiles) this car handles as well as an M3. It's very fast, mostly at the higher speeds.. on the freeway cruising at 55mph then punching it will give you the biggest rush ever, where most cars fall off at 85-90mph this car takes off. Off the line power is better with new Jim Conforti ECU chips (a pair as there are 2 ECUs in the car for the 850's 12 cylinder) Anyone who drives my car and is disapointed must own an 850CSi or has an F1 as a daily driver. With very few bolt ons, an 850 owner can find gobs of untapped power and handling.