The Grand Tour now holds the UK water speed record for an amphibious car. The world water speed record is 60mph and held by something called the WaterCar Python. The Grand Tour probably won't be attempting to smash that.
To start top secret development work on the XJ220's mighty twin turbo V6, Jag installed one in an ordinary Ford Transit van and went around humiliating other drivers away from traffic lights. The van still exists. And still looks like a van.
Current production cars faster than the XJ220 and EB 110 the Bugatti Chiron (261mph) and the Koenigsegg Agera RS (277mph).
The XJ220's 217mph top speed was recorded by ex-F1 ace Martin Brundle at the Nardo high speed bowl in Italy. He later described it as "one of the most dangerous things I've ever done in my life".