The Lambo 291 was a Formula One car designed by Mauro Forghieri for use by the Modena team during the 1991 Formula One season. Its best finish was at the United States Grand Prix when Nicola Larini drove it to seventh place.

Mauro Forghieri was an Italian mechanical engineer, best known for his work as a Formula One racing car designer with Scuderia Ferrari during the 1960s and 1970s. He is credited with introducing the first designed rear wings to Formula One at the 1968 Belgian Grand Prix. He oversaw numerous technical developments during his tenure at Ferrari, including the creation of the 250 GTO and P-series sports racing cars, the Ferrari flat-12 series of engines, Ferrari's first turbocharged engine in the 126 C F1 car, and a prototype semi-automatic transmission in 1979. During Forghieri's tenure with Ferrari, the company won the F1 World Driver's Championship four times and the F1 World Constructors' Championship seven times. After leaving Ferrari in 1987, he worked at Lamborghini and Bugatti then founded the Oral Engineering Group in 1995.