Scion XB vs Volvo V50
The Scion XB is more fuel-efficient at 29 MPG combined, against 22 MPG for the Volvo V50. At EPA assumptions that is about $1,450 less in fuel per year. (Comparison uses each model's most efficient version.)
Side by side
What the numbers say
NHTSA has 122 complaints for the Scion XB and 26 for the Volvo V50. Complaint counts depend heavily on how many of each vehicle were sold, so a higher count does not by itself mean a less reliable car.
Safety recalls on file: 1 for the Scion XB, 3 for the Volvo V50.