To differentiate it from the standard 5, it came with blocky plastic side skirts. Turbo lag was an issue, along with poor hot starting, and was considered rather difficult to control. The same engine was used, with similar issues, in the Renault 9 and 11 Turbos. The regular fuel tank was considered too small for the thirstier Turbo and so a supplementary tank was installed at the rear left of the car, and the 5 GT Turbo also received an oil cooler. Suspension upgrades also meant that the ride height was lowered by in front while a new rear "four-bar" suspension, with a wider track, lowered the rear of the car by . The car's steering, at 3 turns from lock to lock, was also faster than the regular cars, while discs all around (ventilated up front) helped slow things down. The aerodynamic 5.5 inch wide aluminium wheels were similar to those of the Renault Alpine V6 GT.