1985 Australian Grand Prix

The 1985 Australian Grand Prix was a Formula One motor race held on the Adelaide Street Circuit in Adelaide on 3 November 1985. The sixteenth and final race of the 1985 Formula One World Championship, it was the 50th running of the Australian Grand Prix and the first to be held on the streets of Adelaide on a layout specifically designed for the debut of the World Championship in Australia. The race was held over 82 laps of the 3.780 km (2.362 mi) circuit for a total race distance of 310 kilometres. The race was won by Keke Rosberg driving a Williams-Honda; this was the final win for Rosberg, the last race for Alfa Romeo until 2019, and the last by a Finnish driver until Mika Häkkinen won the 1997 European Grand Prix. This would also be the last F1 race for three time world champion Niki Lauda.

The new Adelaide Street Circuit was received extremely positively with glowing reviews from those within the paddock despite the circuit's temporary nature as it wound through streets, parkland and across horse racing venue Victoria Park Racecourse immediately adjacent to the Adelaide central business district, with the drivers enjoying a street circuit that was unlike Monaco and Detroit with their endless short straights, narrow roads and hairpin or right angle corners. The Adelaide circuit was wide and fast in places, and included a 900-metre long straight (named the "Brabham Straight" for Australia's three-time World Champion Jack Brabham) where the faster cars reached over 200 mph (322 km/h). The reception for the track, and the professional way in which the event was organised and executed was sufficiently positive to see the promoters awarded the Formula One Promotional Trophy for 1985.

Dual World Champion Nelson Piquet confirmed the drivers' positive view on the circuit when he said early in race week "After Detroit, Dallas and Las Vegas, we all expected another bad street circuit", while his Brabham team boss and head of the Formula One Constructors Association (FOCA) Bernie Ecclestone told the assembled media that he believed that the standard of the organisation and the circuit itself was bad news for Formula One, explaining that Adelaide had raised the standards of what would be expected in the future and that several tracks in the rest of the world already on the calendar, or hoping to be, would have to lift their own games in order to match it. Over the course of the weekend, the only complaint from the drivers was of a lack of grip on the newly laid surface (along with the new road built inside the Victoria Park Racecourse which is where the pits were located, the entire circuit other than the Brabham Straight had been re-laid a few months prior to the race to prevent the problems often faced on American street circuits where the road surface broke up badly under the strain of the high powered cars). The new surface was causing graining in both qualifying and race tyres. Other than a bump in the road at the end of the Brabham Straight where the old surface met the new one, the circuit itself was generally given the thumbs up by those that really mattered, the teams and their often highly paid drivers.

The only Australian driver in the field, 1980 World Drivers' Champion Alan Jones who was driving the Haas Lola team's Lola THL1-Hart, was given the honour of driving the first Formula One car out onto the new circuit when first practice opened at 10am on the Thursday morning (standard practice at the time was to give an extra day's practice at a new circuit, though the meeting starting on the Thursday with just the support categories became a feature of the AGP in Adelaide). Bernie Ecclestone had arranged for Jones to do a lap of the track before any other cars were released from the pits. Jones also had the honour of having a section of track named after him, with the Rundle Road section of the track, a 350-metre straight between turns 9 and 10, renamed as the "Jones Straight" when the circuit was in use. Jones Straight led directly onto the fast Brabham Straight.

Official qualifying became a battle royal between the Williams-Hondas of 1982 World Champion Keke Rosberg and his teammate Nigel Mansell, and the Lotus-Renault of Ayrton Senna. Rosberg took the honors on Friday with a lap of 1:22.402, only 0.001 faster than Senna, with Mansell a further 0.161 back in third. During final qualifying, Mansell looked to have pole position wrapped up with a lap of 1:20.537 in his Williams FW10, with Senna second with Rosberg another three-tenths further back in third. Senna was out on his third run with only minutes left before the end of qualifying in his black and gold Lotus 97T, powered by a special Renault qualifying engine rumored to be putting out some 1,150 bhp (858 kW; 1,166 PS), and stunned everyone with a time of 1:19.843, seven-tenths faster than Mansell, to grab his 7th pole position of the season. As such, Senna was the only driver to record a time under 1:20- and he went out again but could not get anywhere near that time again.

World Champion designate Alain Prost was 4th on the grid in his McLaren TAG-Porsche, the Ferrari of 1985 World Championship runner up Michele Alboreto fifth, and Marc Surer in his Brabham-BMW rounding out the top six qualifiers. Outgoing World Champion Niki Lauda was 16th on the grid in his McLaren. Alan Jones ended up 19th on the grid after engine and turbo problems throughout practice and qualifying.

The slowest qualifier for the race, Huub Rothengatter in the Osella-Alfa Romeo, was 10.473 seconds slower than Senna with a time of 1:30.319. With only 25 cars appearing for the race (the RAM and Zakspeed teams did not contest the last two races of the season - indeed RAM would never race Formula One again), all cars that attended qualified for the start.

The race of high attrition, which was run in 35 °C (95 °F) heat, was won by Rosberg driving the Williams-Honda; it would turn out to be the last victory (and last fastest lap) of his Formula One career. Rosberg was the only front running driver to finish strongly and one of only eight cars to be classified. It was the fifth and final Grand Prix win of Rosberg's career and confirmed his status as a street race specialist with three of his previous four wins being on the streets of Monaco (1983), Dallas (1984), and Detroit earlier in the 1985 season. Rosberg had some technical problems which could have lost him the race, his race engineer, Frank Dernie suggested a strategy to minimise loss of time. Rosberg gave the winner's trophy to Dernie.