The McLaren Senna is here. Jack Rix from TopGear.com takes a closer look at the deranged, 789bhp road-legal track monster. Subscribe to Top Gear for more videos: http://bit.ly/SubscribeToTopGear WATCH MORE TOP GEAR: Chris Harris Drives: http://bit.ly/ChrisHarrisDrives Drag Races: http://bit.ly/TGDragRaces Series 23: http://bit.ly/TGS23 MORE ABOUT TOP GEAR: Want to watch a bit of Top Gear on the internet? Welcome to the most comprehensive collection of official clips you'll find on YouTube. Whether you're searching for a caravan challenge, Ken Block in the Hoonicorn, cars versus fighter jets, Stig power laps or the latest Chris Harris Drives, you can find all the iconic films here. Make sure you're subscribed to the official Top Gear YouTube channel: http://bit.ly/SubscribeToTopGear This is a channel from BBC Worldwide, trading as BBC Studios, who help fund new BBC programmes.