The 2005 Speed World Challenge season was the 16th season of the Sports Car Club of America's World Challenge series. The series' title sponsor was television network Speed Channel, who broadcast all the races. Championships were awarded for grand touring and touring cars. The season began on March 18 and ran for eleven rounds. Andy Pilgrim and Cadillac won the championships in GT, and Peter Cunningham and Acura won in Touring Car.

Schedule

RndDateCircuitSupportingDistanceGT Winning CarTC Winning Car
GT Winning DriverTC Winning Driver
1March 18Sebring International Raceway, Sebring, FloridaAmerican Le Mans Series (12 Hours of Sebring)67 mi (108 km) (TC) 74 mi (119 km) (GT)Dodge ViperAcura TSX
United States Tommy ArcherUnited States Peter Cunningham
2April 3Streets of St. Petersburg, FloridaIndyCar Series (Grand Prix of St. Petersburg)47 mi (76 km) (TC) 52 mi (84 km) (GT)Dodge ViperMazda 6
United States Tommy ArcherUnited States Randy Pobst
3April 16 April 17Road Atlanta, Braselton, GeorgiaAmerican Le Mans Series (Grand Prix of Atlanta)64 mi (103 km) (TC) 74 mi (119 km) (GT)Cadillac CTS-VAcura TSX
Italy Max PapisBrazil Pierre Kleinubing
4May 22 May 21Mid-Ohio Sports Car Course, Lexington, OhioAmerican Le Mans Series (Grand Prix of Atlanta)56 mi (90 km) (TC) 65 mi (105 km) (GT)Porsche 911 CupAcura TSX
Germany Wolf HenzlerBrazil Pierre Kleinubing
5June 25 June 26Burke Lakefront Airport, Cleveland, OhioChamp Car World Series (Grand Prix of Cleveland)63 mi (101 km) (TC) 69 mi (111 km) (GT)Porsche 911 CupAcura TSX
United Kingdom Robin LiddellBrazil Pierre Kleinubing
6July 2Lime Rock Park, Lakeville, ConnecticutAmerican Le Mans Series (New England Grand Prix)63 mi (101 km) (TC) 67 mi (108 km) (GT)Cadillac CTS-VBMW 325i
Italy Max AngelelliUnited States Bill Auberlen
7July 17 July 16Infineon Raceway, Sonoma, CaliforniaAmerican Le Mans Series (Grand Prix of Sonoma)58 mi (93 km) (TC) 63 mi (101 km) (GT)Chevrolet Corvette C6BMW 325i
United States Lou GigliottiUnited States Bill Auberlen
8July 30 July 31Portland International Raceway, Portland, OregonAmerican Le Mans Series (Portland Grand Prix)61 mi (98 km) (TC) 65 mi (105 km) (GT)Chevrolet Corvette C6Mazda 6
United States Dino CrescentiniUnited States Randy Pobst
9August 13 August 14Streets of Denver, ColoradoChamp Car World Series (Centrix Financial Grand Prix of Denver)49 mi (79 km) (TC) 53 mi (85 km) (GT)Porsche 911 CupAcura RSX
Germany Wolf HenzlerUnited States Eric Curran
10September 4 September 3Mosport International Raceway, Bowmanville, OntarioAmerican Le Mans Series (Grand Prix of Mosport)69 mi (111 km) (TC) 64 mi (103 km) (GT)Cadillac CTS-VMazda 6
Canada Ron FellowsUnited States Charles Espenlaub
11October 16Mazda Raceway Laguna Seca, Monterey, CaliforniaAmerican Le Mans Series (Monterey Sports Car Championships)58 mi (93 km) (TC) 45 mi (72 km) (GT)Cadillac CTS-VAudi A4T
Italy Max PapisUnited States John Angelone
  • (PDF). Sports Car Club of America. Archived from (PDF) on 6 October 2011.