What is GLI?
Volkswagen's performance badge for the Jetta sedan, essentially a GTI in four-door form.
GLI is the badge Volkswagen puts on the sporting version of the Jetta. The letters are usually read as Grand Luxe Injection, a sedan counterpart to the hatchback GTI, though Volkswagen has never been especially consistent about spelling it out.
The car underneath is close to a GTI with a trunk. Across recent generations the GLI has shared the same turbocharged 2.0-liter engine, the same choice of manual or dual-clutch gearbox, and much of the same suspension, brake, and limited-slip differential hardware as the Golf GTI of the same era. The differences are the body, the ride tuning, and the price, which has historically undercut the GTI.
That makes it a quiet favorite among people who want hot hatch mechanicals without the hatchback shape, whether for looks, for a bigger trunk, or because a sedan draws less attention. The GLI badge dates back to the Mk1 Jetta era and has appeared on and off ever since, sometimes as a full model and sometimes as a trim.

