The Renault 8 (Renault R8 until 1964) is a small family car produced by the French manufacturer Renault in the 1960s and early 1970s. It is a four-door saloon car with a rear-engine, rear-wheel-drive layout. The 8 also formed the basis for the larger Renault 10, introduced in 1965.

The 8 was launched in 1962 and ceased production and sales in France in 1973. By then the related Renault 10 had already been replaced, two years earlier, by the front wheel drive Renault 12.

They were produced in Bulgaria until 1970 (see Bulgarrenault), and an adapted version of the Renault 8 continued to be produced in Spain until 1976. In Romania, a version of the 8 was produced under license between 1968 and 1972 as the Dacia 1100. In total 37,546 Dacia 1100s were built.

The R8 (model R1130) was released in June 1962 and was based on the Renault Dauphine, with which it shared its basic architecture and its 2,270 mm (89.4 in) wheelbase. The style, closely following that of the first prototype produced, at unusually short notice, by Philippe Charbonneaux, was fashionably boxy; however, while the Renault 8 was actually 30 mm (1.2 in) narrower than the Dauphine, the manufacturer was able to install thick cushioned front seats that were actually each 60 mm (2.4 in) wider, at 560 mm (22.0 in), than those fitted in the Dauphine.

The 8 was powered by an all new 956 cc Cléon-Fonte engine developing 44 PS (32 kW; 43 hp). The R8's engine followed the pioneering example of the recently introduced Renault 4 by incorporating a sealed for life cooling system. A distinctive innovation on the French produced cars was the fitting of four-wheel disc brakes, a first for a saloon car of this size. However, when in 1965 Renault's Spanish affiliate introduced their own version of the Renault 8 for the (then tariff-shielded) Spanish market, it came with rear drum brakes.

The 8 was sold in the United States with an unusual marketing approach that acknowledged that the previous Dauphine had many shortcomings for American owners, and that the 8 was an improvement. While an all new engine was built that was more powerful, and many changes were made, most of the criticism summarized the 8's shortcomings when driving on the recently constructed United States Interstate Highway System as the car was built for French driving conditions which were much more localized. When driving the 8 in city environments, it is nimble and easy to get around crowded conditions. France did not begin to build the Autoroutes of France until French Law 55-435 was passed April 18, 1955, to create a controlled-access highway system, similar to the German Autobahns and the Italian Autostrada, constructed from the 1930s.

For 1963 (initially only in France), Renault offered an automatic transmission of unique design, developed and produced by Jaeger. It was first shown at the September 1962 Paris Motor Show. Although it was described as a form of automatic transmission at the time, in retrospect it was more realistically a form of automatic clutch, inspired by the German Saxomat device which appeared as an option on several mainstream German cars in the 1950s and 60s.

The clutch in the system was replaced by a powder ferromagnetic coupler, developed from a Smiths design. The transmission itself was a three-speed mechanical unit similar to that of the Dauphine, but from the beginning with synchromesh on all gears in this version.