"Torsion beam" refers to a type of suspension system used in some vehicles. It consists of a solid beam that connects the wheels on each axle, helping to support and stabilize the vehicle. Full definition
Handling is courtesy of a rear torsion beam axle and front struts. (cnet.com)
The GT gets fairly basic fare underneath — a McPherson strut front suspension, coupled torsion beam at the rear and 11 - inch front rotors. (autoweek.com)
The Civic Type R is known to cock its rear wheels under extreme provocation, as the only car here with fitted with torsion beam rear suspension, it is easiest to be knocked off line by larger bumps and undulations. (evo.co.uk)