What Is 2003 American Le Mans Series season

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Last updated: April 15, 2026

Quick Answer: The 2003 American Le Mans Series season was the 35th season of the IMSA GT Championship and the fifth under the American Le Mans Series name, featuring 12 rounds from March to October. Audi won the LMP900 class title with the R8, while Corvette Racing claimed the GT class championship with the C5-R.

Key Facts

The 2003 season consisted of 12 races, beginning with the 12 Hours of Sebring on March 15 and ending at Laguna Seca on October 11.
Audi Sport North America won the LMP900 Teams' Championship with the Audi R8.
Drivers Tom Kristensen, Rinaldo Capello, and Allan McNish shared the LMP900 Drivers' title.
Corvette Racing secured the GT Class Manufacturers' and Teams' Championship with the C5-R.
Johnny O'Connell and Ron Fellows were the top GT drivers, winning five races in the Corvette C5-R.

Overview

The 2003 American Le Mans Series (ALMS) marked the fifth season under the ALMS banner and the 35th overall season of the IMSA GT Championship. It featured endurance sports car racing across North America, combining speed, strategy, and technological innovation in a format inspired by the 24 Hours of Le Mans.

The season emphasized hybrid prototypes and production-based GT cars competing simultaneously on track, showcasing diverse engineering and team coordination. It attracted international manufacturers and drivers, reinforcing ALMS as a premier endurance racing series in the United States.

Twelve rounds were held from March to October, starting with the 12 Hours of Sebring and concluding at Mazda Raceway Laguna Seca, creating a balanced schedule across varied circuits.
Audi dominated the LMP900 class, winning 10 of 12 races with their diesel-powered R8, cementing its reputation for reliability and speed under race conditions.
Corvette Racing won the GT class championship, securing seven victories with the C5-R, including dominant performances at Sebring and Petit Le Mans.
The Team Cadillac entered the LMP900 class with new prototypes, though they struggled with reliability and finished behind Audi and Pescarolo Sport.
Speed Channel provided live television coverage for all races, significantly increasing visibility and fan engagement across the United States.

How It Works

The American Le Mans Series followed a multi-class endurance racing format, where different types of cars competed simultaneously under a unified set of rules and scoring.

LMP900 (Le Mans Prototype 900): These were the fastest, most technologically advanced cars, with closed or open-cockpit designs and top speeds exceeding 200 mph on straights.
LMP675: Smaller, lighter prototypes with maximum engine displacement of 3.4L, designed to promote efficiency and innovation in lower-power categories.
GT Class: Based on production sports cars like the Chevrolet Corvette C5-R, modified for racing with enhanced aerodynamics, suspension, and braking systems.
Competition Format: Races lasted between 2 to 12 hours, requiring multiple driver changes, pit stops, and fuel strategy to complete the distance.
Scoring System: Points were awarded based on finishing position within each class, with winners earning 25 points and partial points for attrition.
Team Structure: Each team fielded two to three drivers per car, rotating during pit stops to manage endurance and maintain competitive lap times.

Comparison at a Glance

The following table compares key performance metrics across top teams and manufacturers in the 2003 ALMS season:

Team	Class	Wins	Championship Points	Notable Drivers
Audi Sport North America	LMP900	10	225	Tom Kristensen, Allan McNish
Corvette Racing	GT	7	198	Ron Fellows, Johnny O'Connell
Pescarolo Sport	LMP900	1	120	Emmanuel Collard, Romain Dumas
Team Cadillac	LMP900	0	85	Karl Wendlinger, Andy Wallace
Flying Lizard Motorsports	GT	2	140	Wolf Henzler, Johannes van Overbeek

This data highlights Audi’s dominance in the prototype class and Corvette Racing’s consistency in GT competition. While smaller teams like Flying Lizard showed promise, factory-backed programs controlled the podiums and championship standings.

Why It Matters

The 2003 season was pivotal in establishing endurance racing as a mainstream motorsport in North America, blending European tradition with American innovation.

Audi's success with the R8 demonstrated the viability of diesel technology, influencing future Le Mans entries and hybrid developments in motorsport.
Corvette Racing's dominance elevated American GT racing globally, boosting Chevrolet's brand image and inspiring factory-backed programs.
The series expanded fan interest through live TV broadcasts, making endurance racing accessible to millions and growing grassroots support.
It provided a testing ground for advanced aerodynamics and fuel efficiency, technologies later adapted for consumer vehicles.
The competition encouraged manufacturer rivalry, with Cadillac, Porsche, and BMW investing in prototypes and GT development.
It laid groundwork for the 2014 merger with Grand-Am, forming the IMSA WeatherTech SportsCar Championship and unifying American sports car racing.

Overall, the 2003 ALMS season was a landmark year that combined high-level competition with technological progress, shaping the future of endurance racing in the U.S.