BBC Sport - Australian GP: Why are McLaren five seconds slower than Mercedes?

Why are McLaren five seconds slower?

BBC Sport's F1 analyst Allan McNish explains why McLaren's new car is over five seconds slower than the pace-setting Mercedes.

McLaren's Jenson Button and Kevin Magnussen qualified 17th and 18th respectively for the season-opening race in Melbourne's Albert Park.

The result is a terrible start to their big-budget new engine partnership with Honda.

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