BRM P139

{{Racing car

|Car_name = BRM P139

|Image = File:BRM P139.jpg

|Category = Formula One

|WC_results_only = Y

|Constructor = British Racing Motors

|Designer = Alec Osborn

|Predecessor = P138

|Successor = P153

|Team = Owen Racing Organisation

|Drivers = {{flagicon|UK}} John Surtees
{{flagicon|UK}} Jackie Oliver

| Technical ref={{cite web|last=OldRacingCars.com|title=BRM P139|url=http://www.oldracingcars.com/brm/p139/|accessdate=22 April 2017}}{{cite web|last=Stats F1|title=BRM P139|url=http://www.statsf1.com/en/brm-p139.aspx|accessdate=23 November 2015}}{{cite web|last=Ultimate car page|title=BRM|url=http://www.ultimatecarpage.com/spec/6229/BRM-P139.html|accessdate=20 August 2016}}

|Chassis = Aluminium alloy monocoque

|Front suspension = Lower wishbones, top rockers actuating vertically mounted inboard coil springs over dampers, anti-roll bar

|Rear suspension = Reversed lower wishbones, top links, twin radius rods, coil springs over dampers, anti-roll bar

|Wheelbase = {{convert|2426|mm|in||abbr=on}}

|Track = Front: {{convert|1549|mm|in||abbr=on}}
Rear: {{convert|1498|mm|in||abbr=on}}

|Engine name = BRM P142

|Capacity = {{convert|2998|cc|cuin|1|abbr=on}}

|Configuration = V12

|Turbo/NA = Naturally aspirated,

|Engine position = mid-mounted

|Gearbox name = BRM

|Gears = 5-speed

|Type = manual

|Differential =

|Weight = 550kg

|Fuel = Shell

|Tyres = Dunlop

|Debut = 1969 British Grand Prix

|Races = 8

|Wins = 0

|Poles = 0

|Fastest_laps = 0

}}

The BRM P139 was a Formula One racing car designed by Alec Osborn, based on the original P126/133/138 design by Len Terry, which raced during the {{f1|1969}} and {{f1|1970}} seasons. It was powered by a 3.0-litre V12 engine. The car was uncompetitive, which resulted in team boss Tony Rudd being asked to resign, with his position being taken over by Tony Southgate, Tim Parnell and Aubrey Woods.{{cite book|last1=Pritchard|first1=Anthony|title=Directory of Formula One Cars: 1966-1986|date=1986|publisher=Aston Publications Limited|location=Bourne End, Great Britain|isbn=0-946627-02-9|pages=49}} After the team did not attend the French Grand Prix, a redesigned P139 appeared at the British Grand Prix, with a roomier, more bulbous cockpit and additional strengthening, giving the P139 a cylindrical appearance. The revised car was barely an improvement on the original P139, and was replaced by the P153 for the 1970 season. The P139 made one final appearance, at the 1970 South African Grand Prix, driven by George Eaton, who was effectively paying for his drive, and thus did not receive a 'works' P153.

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