Wheel size for the 1991 BMW 850I will vary depending on model chosen, although keep in mind that many manufacturers offer alternate wheel sizes as options on many models. The wheel size available will alter the range of tyres available to be fitted.

Fuel consumption for the 1991 BMW 850I is dependent on the type of engine, transmission, or model chosen. The BMW 850I currently offers fuel consumption from 17.0L/100km.

The 1991 BMW 850I has maximum towing capacity of 1600kg. Some models also offer heavy-duty or towing option packs which can increase towing capacity, as well as options which can hamper towing capacity. Towing capacities can vary wildly on a large number of factors. These include engine, transmission, model, and options chosen. Always check with the manufacturer or in your vehicles handbook before attempting to tow anything.