Dennis drives a Range Rover, which appears as the most used vehicle in the series.
In "Charlie Gets Crippled", Dennis backs the Rover over Charlie, and later while driving drunk with mac causes a crash that hospitalizes the Gang and another man.
The Range Rover gets messed up during the ill-fated trip the Grand canyon when running over a mountain bike. ("The Gang Hits the Road")
Charlie and Frank use the Rover to drive to tailgate the open tryouts Mac, Dennis, and Dee are in. ("The Gang Gets Invincible")
After driving it into a lake chasing after a party boat, Dennis tries to sell the Range Rover, claiming it is an amphibious exploring vehicle and yells at a man who tries to buy it as a starter car for his daughter. ("The Gang Misses the Boat")
Following Dennis' departure from Paddy's Pub, Mac blows up the Range Rover with the RPG Rocket Launcher that he gave Dennis for Valentine's Day. ("Dennis' Double Life")
- Interestingly, during "Dennis and Dee Go on Welfare", he drives a Land Rover.