Could you be more specific? Is the battery dead, will the engine not turn over, are the headlights not working, etc.?
You can locate the radio code, for your 1991 Volvo, by consulting your owners manual. The owners manual should have all of the vehicle codes.
Vovlo's own specs give 1600kg as the max towing weight for a 940, slightly more than the 740s and 240s which were 1500kg.
Yes, the 1988 Volvo 740 is a rear-wheel drive (RWD) vehicle. This model features a longitudinally mounted engine with a rear drive layout, which was typical for many Volvo models of that era. The RWD configuration contributes to its handling characteristics and overall driving experience.
Castrol 20w50. I have had two Volvo 740s and have been using it for years. In fact, my brother, sister, and father, all of whom drive Volvos, also use Castrol 20w50. While the oil type is important, it is equally (if not more) important to use Volvo (or Mann) filters consistently. I change my oil every 2,500 to 3,000 miles.
The 2004 Volvo C70 is a gas-powered vehicle.
The 2012 Volvo C30 is a gas-powered vehicle.
The 2001 Volvo C70 is a gas-powered vehicle.
The 2008 Volvo XC90 is a gas-powered vehicle.
The 2013 Volvo XC60 is a gas-powered vehicle.
The 2006 Volvo XC90 is a gas-powered vehicle.
The 2015 Volvo XC70 is a gas-powered vehicle.
The 2002 Volvo C70 is a gas-powered vehicle.