The Uno had MacPherson strut independent front suspension and twist-beam rear suspension with telescopic dampers and coil springs. From 1985, the 1.0 litre (999 cc) SOHC Fully Integrated Robotised Engine (FIRE) powerplant was offered, replacing the 0.9 litre unit. This was a lighter engine, built with fewer parts, and gave improved performance and economy. The most luxurious version, the single-point injected 75 SX i.e., had remote door locks, integrated front foglamps, and the oval exhaust tip also used on the Turbo. In April 1985 the hot hatch version of the first series Uno – the Uno Turbo i.e. – was launched as a three-door only derivative. The Turbo i.e. model used a Ritmo/Strada-derived 1.3 128-series engine with Bosch multi-point fuel injection, Magneti Marelli electronic ignition and a water-cooled IHI turbocharger with an intercooler to reduce intake air temperatures. Engine capacity was initially stated as 1299 cc but this was revised early on in production to 1301 cc. This change was a result of Italy's highway system allowing a higher speed limit to cars of more than 1300 cc. In both forms the engine offered but owners report that the 1301 cc version was notably more responsive and had greater torque than the earlier 1299 cc unit. Cars built from 1985 to late 1987 were fitted with a Ritmo/Strada-derived five-speed gearbox. This was then replaced by a newly developed 'C510' five-speed gearbox, featuring a more durable differential and improved gearchange linkage. Ratios were unchanged between the two units. The Turbo reached . Externally, the Turbo i.e. model featured black plastic sill trims, arch extensions, fibreglass tailgate with spoiler, tinted side glass, side decals, revised front bumper with foglamps and inlets/scoops to direct air to the oil cooler and intercooler. Suspension was lowered and uprated, 13" alloy wheels with Pirelli P6 tyres were fitted and the brakes upgraded to vented discs on the front and solid discs on the rear. The Turbo i.e. featured 'sports' seats, red carpet and an extended centre-console. Later models featured red seatbelts. Options on the Turbo i.e. model included polished Cromodora wheels, electric windows, manual sunroof and digital instrument panel, the latter with bar-graphs for fuel level, coolant temperature, boost pressure, etc., and a digital speed display, switchable between km/h and mph.