Audi Tradition is celebrating half a century of its distinctive five-cylinder engine with a special exhibition at the Audi museum mobile in Ingolstadt. Titled “1-2-4-5-3: 50 years of Audi five-cylinder engines” after the layout’s signature firing order, it brings together seven engine displays and fourteen cars. The show runs from August 1, 2026, to February 28, 2027.

Few engines are as closely tied to Audi’s identity as the five-cylinder. Its uneven cylinder count and unusual firing order give it a characteristic sporty, robust sound, and it underpinned both landmark production cars and a run of motorsport success. To mark the 50th anniversary, Audi Tradition has opened a special exhibition at the Audi museum mobile at the Audi Forum in Ingolstadt, running from August 1, 2026, through February 28, 2027.

Curator Stefan Felber has assembled seven engine displays and fourteen vehicle exhibits tracing the five-cylinder’s five-decade history.

“50 years of the five-cylinder engine is a very special anniversary for Audi: few technologies evoke such strong emotions or have shaped the brand’s image so profoundly over the past five decades. That’s why so many Audi fans and museum visitors have asked us whether we’d mark this anniversary with a special exhibition — a wish we were only too happy to fulfill,” says Felber.

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Where it began

The story starts in August 1976 with the second-generation Audi 100. According to Audi, engineers weighed inline five- and six-cylinder units during its development but ruled out the six on packaging and weight-distribution grounds. The resulting five-cylinder gasoline engine, designated EA 828, drew on the EA 827 four-cylinder first seen in the Audi 80 in 1972. It shared much with that engine — including the 88-millimeter cylinder spacing — but used a longer crankshaft and a longer 86.4-millimeter stroke.

The distinctive sound comes from the odd cylinder count and the 1-2-4-5-3 firing order, with combustion events spaced 144 degrees apart to keep the engine running as smoothly as possible. The first version, a 2,144 cc unit in the Audi 100 5E, produced 100 kW (136 PS), reached 100 km/h in 9.5 seconds and topped out at 190 km/h.

Diesel, turbo and rallying glory

A five-cylinder diesel followed in 1978 — a two-litre naturally aspirated unit with 51 kW (70 PS) — and the first turbocharged five-cylinder gasoline engine arrived in 1979 in the Audi 200 5T, with 125 kW (170 PS). The layout’s public breakthrough came in 1980, when the Audi quattro debuted at the Geneva Motor Show with a 147 kW (200 PS) turbo five. Paired with quattro all-wheel drive, it carried Audi to two manufacturers’ and two drivers’ world rally titles. In Group B form the engine later produced well over 500 PS, and the 1989 Audi IMSA GTO reached 530 kW (720 PS).

From RS2 to the modern TT RS

In production, the 1994 Avant RS2 drew 232 kW (315 PS) from just 2.2 litres and, Audi says, was then the world’s most powerful production estate — launching the RS line. The original five-cylinder series was phased out in 1997, its last examples the 2.5 TDI in the Audi A6 and the 2.2-litre 20V turbo in the Audi S6, itself part of the exhibition.

The layout returned in 2009 with the Audi TT RS, whose transverse 2.5-litre TFSI (based on the EA 855) made 250 kW (340 PS). Overseen by Audi Sport GmbH since 2016, the engine has since been named “engine of the year” nine times in a row.

The exhibition is open at the Audi museum mobile until February 28, 2027.

Facts: Audi five-cylinder milestones

  • Firing order: 1-2-4-5-3 (144° intervals)
  • First unit (1976): 2,144 cc, 100 kW (136 PS), 0–100 km/h in 9.5 s, 190 km/h
  • First turbo (1979): Audi 200 5T, 125 kW (170 PS)
  • Audi quattro (1980): 147 kW (200 PS)
  • Avant RS2 (1994): 232 kW (315 PS) from 2.2 litres
  • TT RS (2009): 2.5 TFSI, 250 kW (340 PS)
  • Exhibition: Audi museum mobile, Ingolstadt, Aug 1, 2026 – Feb 28, 2027

Source: www.audi.com