You'll have to indulge us here, because we're comparing a car that's no longer on sale with one that is, and not only that - they're both from the same stable. But you want to know how the new McLaren Senna stacks up against the McLaren P1, right? Yeah, of course you do.

So let's not get picky about fiddly details like whether a car is actually on sale - all 500 examples of the Senna are sold, too, so even if it's a current production car, it's just about as attainable as the long-since departed P1 unless you've already got yours on order. 

Enough of that, more about these two actually very different McLaren hypercars. 

McLaren P1 5th anniversary
2018 McLaren Senna prototype

The cars

When the P1 was launched, it was like a comic book illustrator had been given free rein to design a supercar. That dished rear wing, the squinty front end, it was a caricature of a supercar, next to the more familiar forms of others like the Ferrari LaFerrari and Porsche 918 Spyder that launched at the same time, forming some unholy trinity of million-pound, mega-fast high-tech hypercars. 

The McLaren Senna is totally different to all of those older cars. It is the most track-focussed road car that McLaren has ever produced, and it looks it. Even McLaren describes it as 'brutalist' and we'd go along with that. The huge wing adjusts through a remarkable breadth of movement to keep this car - which feels more endurance racer with a token number plate than road-going supercar - stuck to the road. It also shuns any fancy hybrid tech, which rather defined the P1's futuristic electric-power-meets-V8 character. 

Read on for all the tech details and performance comparison figures, and scroll down for galleries and video action of these two remarkable cars. 

5 Years of the McLaren P1
2018 McLaren Senna prototype
  McLaren P1 McLaren Senna
Price  £866,000 (at launch) £750,000
Engine  3.8-litre twin-turbo V8 plus electric motor 4.0-litre twin-turbo V8                        
Transmission  7-spd automatic 7-spd dual-clutch automatic
Drivetrain  Rear-wheel drive Rear-wheel drive
Power  903bhp at 7300rpm (combined) 789bhp at 7250rpm
Power per tonne  647bhp 659bhp
Torque  664lb ft at 4000rpm (combined) 590lb ft at 5500 - 6700rpm
0-62mph  2.8sec 2.8sec
0-124mph  6.8sec 6.8sec
0-186mph  16.5sec  17.5sec
1/4 mile  9.8sec 9.9sec
124mph - 0mph  116 metres 100 metres
Top speed  217mph 211mph
Max. downforce  600kg  800kg
Fuel economy  34mpg TBC (Like you care)
CO2 emissions  194g/km TBC (A lot)
Seats  2 2
Length  4588mm 4744mm
Width (incl. mirrors)  2144mm 2153mm
Height  1188mm 1229mm
Wheelbase  2670mm 2670mm

Weight (dry)

 1395kg 1198kg

Which one wins? 

Well, if we're to give the win on the basis of straight-line performance, it has to go to the P1. The Senna, notably, keeps up with the P1 in just about every way until you get up past 124mph, when the P1 pulls out a lead and gets to 186mph a second quicker than the Senna.

However, check out that downforce. And which would be faster around a track? Well, even with both on bespoke Pirelli P-Zero Trofeo tyres, the Senna would better a P1 around almost any track. That extra downforce sees it spearing through Silverstone's Abbey corner 9mph faster than a P1, and it's 9mph faster through Farm Curve and 3mph faster through Stowe. too.

There's empirical evidence that that the Senna is faster through corners than a P1, and here at Motor1 we like corners, and so we'd take the Senna, thanks. You can always let us know on Twitter or Facebook if you think we're wrong on that one... 

Check out:


Gallery: 2018 McLaren Senna prototype

Gallery: 5 Years of McLaren P1


[UPDATE] YouTube video has been removed from article here.