 They are all similar in specifications and performance, and in a race around Silverstone circuit they were all within half a second of each other, the P1 finishing first at 58.24 seconds and the LaFerrari finishing last at 58.58 seconds; the 918 was in-between with 58.46 seconds.58 units of the track-oriented P1 GTR and 5 units of its road legal counterpart, the P1 LM were produced after the initial run of 375 cars.13 experimental Prototype 'XP', 5 Validation Prototypes 'VP' and 3 Pre-Production 'PP' cars were produced by McLaren before the production of the P1 started, a number of which have been refurbished, modified and sold to customers.