reduced some disadvantages of RR layout. Mercedes-Benz also produced several models of RR cars in this period, starting with the 130H (1934). The radical 1930s Tatra format (air-cooled, rear engine and streamlined, teardrop design) was an influence on Ferdinand Porsche's 'People's Car' (Volkswagen) for Adolf Hitler. As well as being the most produced car ever, it set a trend for RR small cars that lasted well into the 1960s. The final form of the RR Volkswagen was the Type 3 of 1961, which flattened the engine (or 'pancake'), allowing for luggage spaces front and rear. Porsche has continued to develop its 911 model as a rear-engined vehicle, although they have introduced multiple all-wheel-drive models. Most notably, the 911 Turbo has been sold as AWD-only since the release of the 993 model. Race-oriented models such as the GT3 and twin-turbocharged GT2 remain solely RR, however. Another manufacturer to implement the RR configuration was the DeLorean Motor Company with its DeLorean sports car. To compensate for the uneven (35/65) weight distribution caused by the rear-mounted engine, De Lorean used rear wheels with a diameter slightly greater than the front wheels. Before that was the rear-engined Škoda's from Škoda 1000MB (produced from 1964) to Škoda 130/135/136 (produced until 1990) or the Polski Fiat 126p (produced until October 2000). A range of sports road cars and racing cars with the RR layout was produced by the French company Alpine. These had bodies made of composite materials and used mechanical components made by Renault. (Alpine was eventually acquired by Renault; the A610 was a Renault product that used the Alpine name.) Early cars using the RR layout included the Tucker, Volkswagen Beetle, Porsche 356, Chevrolet Corvair, NSU Prinz and Hino Contessa. Present day Examples of modern combustion engine cars using the layout include the Porsche 911, Mitsubishi i, Smart Forfour, and Renault Twingo. Many modern electric cars use an RR layout for base variants with a single motor due to the low weight and cooling requirements of the electric motor. The Tesla Cybertruck and GMC Hummer EV will also use this layout for their base variants. Most modern heavy duty buses use an extreme RR layout. In transit buses this can be used to make a very low floor level in the first two-thirds of the bus, thus making disabled access much easier. Most tour buses and coaches also employ a similar design, however the