Michael Schumacher's first F1 car, 1991 Jordan 191. Qualified seventh, retired on first lap with clutch failure. Car is up for auction, expected to bring around $2 mil.
1938 Alfa Romeo 158, aka the "Alfetta"; it's initial career was cut short by WWII, it reappeared in 1947 powered by a 1.5-liter 8-cylinder engine of 296 hp, becoming the first modern "F1" car. Successful? It won 47 of the 54 races it entered.
Bob Jane's Jaguar Mk2 at Lakeside in 1963. Original 3.8L engine replaced by full race prepped 4.2 from an XKE using mostly custom made parts, 320hp but only good for around 500 miles between rebuilds. Car was capable of 151mph while its main competitor, a 351 powered Ford Mustang, only did 154mph. Jane took the ATCC title twice before rules change limited the Jag to its original 3.8 engine while the Mustangs were showing up with 427ci big blocks. (He claimed the title twice more, '71 and '72, in a Camaro ZL-1, and remained active in Australian motorsport until his death in 2018.)
The 1963-1964 MGB saw much success in 1960's events at Sebring, Le Mans, Nurburgring, and Targa Florio, opening a window on sports car marketing and racing.
June 19, 1949, the first NASCAR race is held on a dirt track in Charlotte, NC, for "strictly stock" cars.
Only 11 of the 33 starters finished the race, overheating engines took out many, while others succumbed to broken wheels due to the rough track. Glenn Dunnaway, in a Ford, was first across the line. Then he was disqualified when inspection showed oversized truck springs on the rear of his car (which was actually a moonshine hauler); thus Jim Roper, "running a distant second" in a Lincoln after leading 40 laps, became winner of NASCAR's first race. Roper competed in only one other event then moved to Texas and operated a horse farm til his death in 2000.