EuroBrun Racing was a Swiss-Italian Formula One constructor based in Senago, Milan, Italy. They participated in 46 Grands Prix between 1988 and 1990, with an Italian license, entering a total of 76 cars.

The team was a combination of two outfits – the mechanical manpower and skill of Giampaolo Pavanello's Euroracing team, who had also run the factory-backed Alfa Romeo Formula One team from 1982–85, and the financial muscle and organisational skill of Swiss slot machine magnate and former touring car driver Walter Brun, who owned and ran the Brun Motorsport sports car team.

1988

For the team's debut season in 1988, Mario Tolentino designed the ER188 chassis, to be powered by a normally-aspirated 3.5-litre Cosworth DFZ engine. 1987 Formula 3000 champion Stefano Modena and long-time Brun sportscar stalwart Oscar Larrauri were signed to drive.

Despite a solid if unspectacular start to the season, EuroBrun were soon struggling as money ran low.

There was internal trouble when Brun unsuccessfully tried to replace Larrauri with Christian Danner (the Argentine driver had gained the unwanted reputation among his fellow drivers of being a 'mobile chicane' in both qualifying and races) and Euroracing were showing disinterest in Formula One. Both drivers failed to qualify at certain events (Modena missing out four times and being excluded from another two races for technical infringements, and Larrauri failing seven times). Modena's 11th place at the Hungarian Grand Prix was the team's best result of the year.

1989

Before the 1989 season, Euroracing slimmed down to a nominal level of involvement, in the shape of a handful of engineers and mechanics. EuroBrun scaled back to a single car (being the only team to enter one car that year, as opposed to two) to be driven by Swiss driver Gregor Foitek, while the ER188 was modified slightly to take a Judd V8 engine and Pirelli tyres.

The team would only make it through pre-qualifying once, in the opening race of the season in Brazil, and then Foitek failed to qualify. Even the introduction of George Ryton's new ER189 for the German Grand Prix did not help. Foitek quit after the Belgian Grand Prix, to be replaced by the returning Larrauri, who was no more successful.

1990

Despite failing to start a single race in 1989, the team returned in 1990 with two cars once again.

Euroracing had now left the partnership altogether and the team started the season with an upgraded version of the ER189 known as the ER189B. Roberto Moreno led the team, with Claudio Langes in the second car. Langes would not make it through pre-qualifying once.

A freak qualifying session at the opening race of the season in the United States saw Moreno start 16th on the grid and he eventually finished 13th. The capable Brazilian qualified again in San Marino and came close on other occasions, but as Brun lost enthusiasm, the EuroBruns fell further and further away from the grid. After 14 rounds the team withdrew from the Formula One Championship, having made only 21 starts from 76 entries.

In 2021, Moreno claimed that the team purposely did not want to qualify for races so as not to spend funds they did not have on extra tyres and engine rebuilds, stating that the team gave him race-marked tyres to qualify on and the Judd engines went as long as four events without rebuilds.

ER188

1988

The EuroBrun ER188 was a Formula One car built and raced by the EuroBrun team for the 1988 Formula One season. The car was designed by Mario Tolentino and was powered by a normally aspirated Cosworth DFZ engine. Three ER188 chassis were produced.

Two cars were entered for 1987 Formula 3000 champion Stefano Modena of Italy and long-time Brun sports car stalwart, 33-year-old F1 rookie, Argentine Oscar Larrauri.

Despite a solid, if unspectacular start to the season, EuroBrun were struggling as money ran low. There was internal trouble when in May 1988 Brun unsuccessfully tried to replace Larrauri with German driver Christian Danner. It turned out that the German driver was too tall for the monocoque of the ER188. Since the team had no money for any modification it kept Larrauri in the second car to the end of the season, much to the annoyance of most of the other drivers as the Argentine had gained the unwanted reputation of being slow and hard to pass, especially when being lapped as the EuroBruns were often.

Starts didn't turn into finishes, with engine failures, clutch and gearbox problems, and even a flat battery meaning that Modena's 11th place at the Hungarian Grand Prix would be the car's best result.

ER188b

1989

For the 1989 Formula One season the car was updated to ER188B specification and used a Judd CV V8 engine and Pirelli tyres. The team entered just one car for rookie Gregor Foitek.

The ER188B was largely unsuccessful. Foitek only managed to pre-qualify once for a Grand Prix (in Brazil), but failed to qualify for the main race. During the entire season, the team did not manage to start a single race. It was replaced by the new ER189 chassis later in the season.

For the 1989 season, the car was powered by a naturally aspirated Judd CV 3.5 litre V8 engine and drove it on Pirelli tyres. A six-speed manual transmission from EuroBrun/Hewland was used.

The replacement ER189 designed by George Ryton was introduced at the German Grand Prix.

ER189

1989

The EuroBrun ER189 and ER189B were Formula One cars built and raced by the EuroBrun team for the 1989 and 1990 Formula One seasons. The cars were designed by George Ryton and were powered by a normally aspirated Judd EV engine.

The ER189 debuted in the 1989 British Grand Prix, driven by Swiss Gregor Foitek, who failed to pre-qualify. Foitek was unable to get out of Friday pre-qualifying for the next three races and left the team after the 1989 Belgian Grand Prix. Oscar Larrauri, who had driven for the team the previous year, was called back to finish the season, although he failed to pre-qualify for a single race as well.

ER189b

1990

The EuroBrun ER189B is the last Formula 1 single-seater entered by the EuroBrun Racing team in its final participation in the Formula 1 World Championship, in 1990.

It made its championship debut at the U.S. Grand Prix, succeeding the EuroBrun ER189. This single-seater, designed by George Ryton, Roberto Ori and Kees van der Grint, was directly inspired by its predecessor from the 1989 season. Piloted by Brazilian driver Roberto Moreno and Italian Claudio Langes, it was entered fourteen times but only managed to qualify twice, at the start of the season in the hands of Roberto Moreno.

In March 1990, the FIA published the list of entered drivers, and EuroBrun entered two single-seaters, powered by a Neotech engine but starting with the Judd V8 from the previous season.

After the European season, Walter Brun, owner of EuroBrun Racing, announced that he wished to devote himself solely to his commitment to the World Sports Car Championship, and withdrew for the remainder of the season. Fined $400,000 for his two forfeits, EuroBrun left Formula 1 for good. The ER189B is therefore the team's last Formula 1 single-seater.

1990

At the end of the European season, Walter Brun informs his drivers that he now wishes to devote his attention solely to entering his three cars in the World Sports Car Championship, and that he will forego the costly trips to Japan and Australia. FIA Vice-President Bernie Ecclestone confirms a $200,000 fine for each forfeit until the end of the season. Ecclestone also announced that any team failing to pay its forfeit fines would automatically be refused entry for the 1991 season. EuroBrun thus left Formula 1 for good.

EuroBrun participated in 46 Grands Prix, but only managed to qualify for the race 21 times. The team achieved not a single championship point throughout its existence.