The Autodromo Hermanos Rodriguez circuit is one of the fastest tracks on the calendar thanks to the venue's high altitude.
At 2,200m above sea level, the air is thinner and cars therefore have less resistance to deal with. Teams also tweak engine settings to ensure the delivery of peak performance despite the loss of power associated with the rarefied atmosphere.
Force India's Mercedes-powered VJM10 has been a regular contender for top speed this season, and yesterday in qualifying Esteban Ocon was fastest down the main straight at 355.6 km/h.
Given their dismal performance Saturday afternoon, Kevin Magnussen and Romain Grosjean's fifth and sixth top speed speaks volumes for their Haas' lousy balance around the corners in Mexico.
Fernando Alonso on the other hand boasted about his McLaren's handling qualities, insisting his MCL32 was the best car in the field.
Yet McLaren is the usual laggard when it comes to top speed, with Stoffel Vandoorne bringing up the rear, unequivocally suggesting that the team's 2018 Renault engine can't come soon enough!
Gallery: The beautiful wives and girlfriends of F1 drivers
Keep up to date with all the F1 news via Facebook and Twitter
