Question: The Opel Ascona was a large family car (D-segment in Europe) produced by the German automaker Opel from 1970 to 1988, in motorsport, the Ascona 400 rally car driven by which German rally and auto racing driver, with victories for Fiat, Opel, Lancia and Audi as well as Porsche, Ford and BMW?

Context paragraphs:
Opel Astra: The Opel Astra (Lat: "Stars") is a compact car/small family car (C-segment in Europe) engineered and manufactured by the German automaker Opel since 1991.

Lancia Delta Group A: The Lancia Delta Group A is a Group A rally car built for the Martini Lancia by Lancia to compete in the World Rally Championship.  It is based upon the Lancia Delta road car and replaced the Lancia Delta S4.  The car was introduced for the 1987 World Rally Championship season and dominated the World Rally Championship, scoring 46 WRC victories overall and winning the constructors' championship a record six times in a row from 1987 to 1992, in addition to drivers' championship titles for Juha Kankkunen (1987 and 1991) and Miki Biasion (1988 and 1989), making Lancia the most successful marque in the history of the WRC and the Delta the most successful car.

Opel Vectra: The Opel Vectra is a large family car that was engineered and produced by the German automaker Opel.  In the United Kingdom, the car was sold under the Vauxhall marque as the Vauxhall Cavalier and later as the Vauxhall Vectra, from 1995 onwards.  It has also been sold by Holden in Australasia as Holden Vectra, and by Chevrolet in Latin America as the Chevrolet Vectra.

Vauxhall Cavalier: The Vauxhall Cavalier was a large family car sold primarily in the UK by Vauxhall from 1975 to 1995.  It was based on a succession of Opel designs throughout its production life, during which it was built in three incarnations.  The first generation of Cavalier, launched in 1975 and produced until 1981, was based on the existing Opel Ascona with a few minor visual differences.

Kissling Motorsport: Kissling Motorsport is a German auto racing team based in Münstereifel, Germany.  The team has raced in the multiple series' around the world, as well as having a close cooperation with Opel and Opel Performance Center.  Having developed several Opel racing cars, amongst them are the Opel Omega 3000 24V Evo that raced the 1993 Deutsche Tourenwagen Meisterschaft, the Opel Astra TCR that was raced in the 2016 TCR International Series.  The team have also developed several Opel Cup car amongst them the Opel Calibra Cup and Opel Astra Cup cars.

Walter Röhrl: Walter Röhrl (born 7 March 1947) is a German rally and auto racing driver, with victories for Fiat, Opel, Lancia and Audi as well as Porsche, Ford and BMW.

Opel Ascona: The Opel Ascona was a large family car (D-segment in Europe) produced by the German automaker Opel from 1970 to 1988.  It was produced in three separate generations from 1970 to 1988, beginning with rear-wheel-drive and ending up as a front-wheel drive J-car derivative.  In motorsport, the Ascona 400 rally car driven by Walter Röhrl won the World Rally Championship drivers' title in the 1982 season.

Opel Signum: The Opel Signum is a large family car that was engineered and manufactured by the German automaker Opel from 2003 to 2008.  It was almost exclusively sold in Europe.  In the United Kingdom, it was rebadged and sold under the Vauxhall Signum name.  The Opel Signum was largely based on the Opel Vectra, and used the long wheelbase version of the GM Epsilon platform, also used by the Opel Vectra Caravan.

Opel Patent Motor Car: The Opel Patent Motor Car, System Lutzmann (Opel Patentmotorwagen „System Lutzmann“ in German) is the first car from the German automaker Opel.  Only 65 vehicles were produced from 1899 to 1902.

Antonio Fassina: Antonio "Tony" Fassina (born July 26, 1945) is a former rally driver from Italy.  He won the Italian Rally Championship in 1976 and 1979 driving a Lancia Stratos HF, and then again in 1981 behind the wheel of an Opel Ascona.  In 1982, he drove the Ascona to victory in the European Rally Championship.  He also competed with success in the Italian round of the World Rally Championship, Rallye Sanremo, scoring four top five results between 1976 and 1981, including outright victory in the 1979 event ahead of Walter Röhrl.

Supporting paragraphs: Opel Ascona Walter Röhrl
Answer: Walter Röhrl