Mazda 787B

Mazda 787B

The Mazda 787B is one of the most important and celebrated racing cars in history — the only car powered by a rotary (Wankel) engine to win the 24 Hours of Le Mans, and the only Japanese car to achieve outright victory at the world's most prestigious endurance race. Its triumph on June 23, 1991, remains one of the most emotionally resonant moments in motorsport and the crowning achievement of Mazda's decades-long commitment to rotary engine technology.

Mazda's Le Mans campaign began in 1970 and represented one of the most determined and persistent efforts in the race's history. For over two decades, Mazda brought rotary-powered cars to La Sarthe, gradually improving their competitiveness while fighting against the fundamental efficiency disadvantages of the Wankel engine compared to conventional piston engines. The 787B was the culmination of this extraordinary 21-year journey.

The R26B engine was Mazda's masterpiece — a naturally aspirated four-rotor Wankel engine displacing 2,616cc (four rotors of 654cc each). It produced approximately 700 hp at 9,000 rpm — extraordinary specific output from such modest displacement. The engine was notable for its extremely broad powerband, delivering strong torque across a wide rev range, and its reliability under sustained high-stress running — critical for a 24-hour race. The engine's peripheral port intake system and sophisticated fuel injection management were developed through years of racing experience.

The 787B's most famous characteristic was its sound. The four-rotor engine produced a banshee-like scream at high RPM that was utterly unlike any piston engine and is universally regarded as one of the most evocative sounds in motorsport history. Recordings of the 787B at full chat through the Mulsanne Straight remain among the most played motorsport audio clips on the internet.

The car itself was a carbon fiber composite Group C prototype designed for the 1991 regulations. The chassis was a carbon-Kevlar monocoque with an aluminium honeycomb core, weighing just 830 kg. The aerodynamics were developed in wind tunnel testing to generate significant downforce while maintaining the low drag needed for the long Mulsanne Straight.

The 1991 Le Mans race was the 787B's finest hour. The winning car, chassis 787B-003 wearing the iconic #55 and its distinctive green and orange Renown livery, was driven by Volker Weidler, Johnny Herbert, and Bertrand Gachot. In a race of attrition that saw many of the favored Sauber-Mercedes and Jaguar entries retire, the Mazda team's meticulous preparation and the R26B's remarkable reliability proved decisive. Herbert, driving the final stint despite severe fatigue, brought the car across the line to a victory that stunned the motorsport world.

The victory was bittersweet for Mazda in one respect: rule changes for 1992 effectively banned rotary engines from Le Mans, meaning the 787B's triumph was both the first and last opportunity for a rotary car to win. This finality adds to the legend — the 787B seized its only chance and delivered one of the most improbable and moving victories in racing history.

Three 787B chassis were built (787B-001, 787B-002, 787B-003), along with several earlier 787 models. The winning car, #55 787B-003, is preserved in Mazda's museum in Hiroshima and is occasionally brought out for demonstration runs, where its extraordinary sound continues to move spectators to tears. The 787B is permanently displayed in the Le Mans Museum's collection of race winners and remains the most beloved Le Mans car among many fans and journalists.