The Lechner Spyder SC91 was a sports prototype racing car, originally built by Reynard Motorsport for Walter Lechner and his Walter Lechner Racing School Interserie team in 1991. The car was rebuilt as the Reynard Spyder in 1993, and became known as the Reynard Horag in 1997. Throughout its career, it used a Formula 1-derived 3.5-litre Judd V10 engine. One car was built, and it proved successful; taking the Interserie Division I title in 1997 and 1998, in addition to being the strongest non-Porsche 962 in 1991, and the strongest non-Kremer CK7 Spyder in 1993.

In 1991, Reynard Motorsport were commissioned by Walter Lechner to build a sports prototype for the Division I class of the Interserie. The car they built was called the Lechner Spyder SC91, and used a 3.5-litre Judd V10 engine, similar to one used in Formula One. Lechner drove the car himself, usually under the "Walter Lechner Racing School" banner, and gave it its debut at the second round of the 1991 Interserie season, which was the Nürburgring Supersprint; he retired after five laps due to a vibration. Two weeks later, he competed in the next round, held at the Österreichring; Lechner took fifth in the first race, and sixth in the second, resulting in him being classified in fifth overall.Brands Hatch was next, and Lechner took third in the first race, and repeated the feat in the second race, although he was classified fourth overall. Lechner was unable to start the Most round, but returned for the Siegerlandring event. At Siegerlandring, Lechner struggled in the first race, and was only able to finish tenth; however, he finished second in the other race, and was classified in second overall. The final round of the season saw a return to the Österreichring; Lechner took second in the first race, and, despite dropping to fourth in the second race, took second overall. Lechner finished the season in fourth place, and was the most successful non-Porsche 962 driver.

...
Wikipedia