Cost
The destination charge is a standard charge for transporting the vehicle from its point of origin to the dealer. It costs approximately the same to get the Volvo S80 to the dealership as the Cadillac.
The Cadillac STS pales in comparison to the Volvo S80 as far as gas mileage.
The Volvo S80 won't save you much money at the pump compared to the Cadillac STS.
Regarding MSRP, the Volvo S80 costs substantially less than the Cadillac STS.
Utility
The Volvo's bigger trunk will accommodate more sizeable things than the STS.
The Cadillac and the Volvo S80 can accommodate the same number of passengers.
The Volvo S80 outpulls the Cadillac STS by a large margin.
Convenience
You'll definitely have to take the Cadillac STS for a fill-up more often than the Volvo S80 because of its tank size and fuel economy.
Comfort
Taller drivers will markedly enjoy the extra head room in the Cadillac STS's front cabin compared to the Volvo S80.
The Cadillac STS offers more head- and leg-room to your passengers than the Volvo does.
Dimensions
The Cadillac STS is a little heavier than the Volvo.
The Cadillac STS's tank is roughly the same size as the Volvo S80's, though the Volvo S80's is slightly larger.
The Volvo S80 and the Cadillac STS compete for the same parking spaces.
Performance
Regarding horsepower, the Cadillac STS packs quite a wallop and will knock the S80 down a few rungs. However, remember that high horsepower engines often command higher insurance premiums.
With that kind of horsepower, the Cadillac STS is a veritable sportscar.
Handling
The Cadillac and the Volvo have about similar tires.
With their comparable turning circles, the Cadillac STS and the Volvo S80 indubitably handle about the same into and out of tight spots.
Drivetrain
The Volvo's engine is tremendously smaller than the Cadillac STS's. Remember that a smaller engine usually has to work a little harder; on the flip side, smaller engines typically get better gas mileage.
The Cadillac STS packs quite a punch compared to the Volvo S80 with respect to torque, which is the force that lets you accelerate quickly.
Overview
The S80 and the Cadillac STS have the same basic warranty.