2,140 articles
Homestead Fe
Homestead Fe is the FIA-licensed circuit designation for the Formula E layout at Homestead-Miami Speedway, Homestead, Florida: a 2.604 km (1.618 mi) special circuit at the 1.5-mile banked oval venue opened in 1995.
Honda in Formula One
Honda in Formula One: Japanese manufacturer's F1 history as constructor and engine supplier, 1964-1968, 1983-1992 (McLaren, 44 wins), 2000-2008 (BAR), 2015-2021 (Red Bull), and Aston Martin works partnership from 2026 with the RA626H power unit.
Hong Kong City Circuit
Hong Kong City Circuit: FIA Grade 6R licensed temporary rallycross street circuit at Hong Kong's Central Harbourfront, 0.735 km listed lap, built in about 10 days for the 2023 World RX finale, licence valid to 10 November 2026.
Hour record
Hour record: longest distance cycled in one hour from a standing start in a velodrome. Men's record 56.792 km (Filippo Ganna, 2022); women's 50.455 km (Vittoria Bussi, 2025); UCI standard pursuit-bike rules since 2014.
Hsiao Mei Yu
Hsiao Mei Yu (蕭美玉), born 1985 in Taichung, is a Taiwanese road and track cyclist for Chinese Taipei; two-time Olympian (2012, 2016 omnium 17th) and seven-medal Asian Games cyclist with road race gold at Guangzhou 2010.
Hudson Hornet
Hudson Hornet, the "Fabulous Hudson Hornet," an American car built 1951–1957; Step-Down 1951–54 with 308 cu in six and Twin H-Power dominated NASCAR, then AMC-badged Nash-based cars to 1957.
Hungarian Grand Prix
Hungarian Grand Prix: F1 race at the Hungaroring near Budapest, first held 1986, first behind the Iron Curtain; 4.381 km, 70 laps; Hamilton has 8 wins, McLaren 13; contracted until 2032.
Hungaroring
Hungaroring: 4.381 km permanent F1 circuit at Mogyoród near Budapest, host of the Hungarian Grand Prix since 1986, the first F1 race behind the Iron Curtain; tight, twisty, low-speed layout nicknamed 'Monaco without the barriers', contracted until 2032.
Ida Zetterström
Ida Zetterström, Swedish drag racer based on the Aland Islands, 2023 FIA European Top Fuel champion; NHRA Top Fuel driver since 2024 with JCM Racing and Shawn Reed Racing, holding the European ET record of 3.773 seconds.
Igor Tselovalnikov
Igor Tselovalnikov (Игорь Васильевич Целовальников, 1944–1986), Soviet track cyclist from Kharkiv; Olympic gold in tandem sprint with Vladimir Semenets at Munich 1972, fifth with Bodnieks at Mexico 1968.
Imola Circuit
Imola Circuit (Autodromo Internazionale Enzo e Dino Ferrari), a 4.909 km counterclockwise Italian racetrack opened in 1953; hosted the San Marino Grand Prix 1981-2006 and the Emilia-Romagna Grand Prix from 2020.
Indian Grand Prix
The Indian Grand Prix was a Formula One race held 2011-2013 at the Buddh International Circuit, Greater Noida, won all three times by Sebastian Vettel, and dropped over taxation disputes.
Indianapolis 500
The Indianapolis 500 is an annual 500-mile, 200-lap IndyCar race at the 2.5-mile Indianapolis Motor Speedway, first run May 30, 1911 and won by Ray Harroun; part of motorsport's Triple Crown.
Indianapolis Motor Speedway
Indianapolis Motor Speedway (IMS), 2.5-mile oval in Speedway, Indiana, opened 1909; oldest continually operating US racetrack, home of the Indianapolis 500 since 1911, Brickyard 400, and the $60.5 million renovated IMS Museum.
IndyCar
The NTT INDYCAR SERIES, the top American open-wheel racing series and home of the Indianapolis 500, runs Dallara IR-12/IR-18 chassis with Honda and Chevrolet 2.2-liter twin-turbo hybrid V6s; the IR-28 debuts in 2028 with 760 hp.
IndyCar Series
NTT INDYCAR SERIES, North America's premier open-wheel racing series; Dallara IR12 chassis, Honda/Chevrolet 2.2L twin-turbo V6; IR-28 car with 2.4L 760-hp hybrid engines debuts 2028; home of the Indianapolis 500.
IndyCar Series at Markham Centre
Ontario Honda Dealers Indy at Markham: NTT INDYCAR SERIES street race on a 12-turn, 3.52 km circuit in Markham Centre, Ontario, replacing the Toronto race from 2026 under a five-year deal; Marcus Ericsson won the inaugural 2026 event.
Ineos Grenadiers
Ineos Grenadiers is a British professional cycling team at UCI WorldTour level, owned by INEOS and raced as Team Sky from 2010, with seven Tour de France wins.
Inje
Inje Speedium (인제스피디움) is a 3.908 km, 19-corner FIA Grade 2 racing circuit and resort in Inje County, Gangwon, South Korea, opened May 2013, hosting TCR World Tour, GT, and endurance racing.
Intercontinental Rally Challenge
The Intercontinental Rally Challenge (IRC), also called the International Rally Challenge, was a Eurosport rally series for production-based cars from 2006 to 2012, merged into the European Rally Championship in 2013.
Interlagos Circuit
Interlagos Circuit (Autódromo José Carlos Pace), 4.309 km anti-clockwise F1 track in São Paulo, Brazil; opened 1940, F1 since 1973, renamed for 1975 winner José Carlos Pace, home of the São Paulo Grand Prix through 2030.
International Formula 3000
International Formula 3000, also FIA F3000 International Championship, was the FIA's second-tier single-seater feeder series to Formula 1 from 1985 to 2004, using 3000cc V8 engines, before GP2 replaced it in 2005.
International Hot Rod Association
The International Hot Rod Association is an American drag racing sanctioning body founded by Larry Carrier in 1970, centered on grassroots sportsman racing at member tracks.
International Race of Champions
International Race of Champions (IROC), 1973-2006 all-star stock-car-based series founded by Roger Penske, Les Richter, and Mike Phelps; 12 champions from NASCAR, IndyCar, F1, and sports cars raced identical Camaros, Firebirds, and Porsches; revived as exhibitions in 2024.
Invicta Racing
Invicta Racing, formerly Virtuosi UK, Russian Time and UNI-Virtuosi, is a British FIA Formula 2 team that won back-to-back F2 Teams' and Drivers' titles in 2024 and 2025.
Iowa Speedway
Iowa Speedway, a 0.875-mile Rusty Wallace-designed tri-oval in Newton, Iowa, opened 2006; NASCAR-owned since 2013. Hosts IndyCar and NASCAR Cup, Xfinity, ARCA; 'Fastest Short Track on the Planet.'
Irish Tarmac Rally Championship
The Irish Tarmac Rally Championship is a rally series run across the island of Ireland. Founded in 1978, it runs seven rounds and is sponsored by NAPA Auto Parts.
Iron Dames
Iron Dames is an all-female motor racing and equestrian project founded in 2018 by French-Swiss entrepreneur Deborah Mayer. The team won an FIA WEC race in 2023.
Isack Hadjar
Isack Hadjar is a French racing driver, born in Paris in 2004, who debuted in Formula One in 2025 and races for Red Bull Racing alongside Max Verstappen.
Isle of Man TT
Isle of Man TT (Tourist Trophy), annual motorcycle road race first run 28 May 1907 over the 37.73-mile Snaefell Mountain Course; time-trial format, ~265 competitor deaths since 1907, Senior TT blue riband, major Isle of Man economic event.