Head to head with Lexus LS400 and LS600h

Lexus is currently celebrating 20 years in the UK. To mark the day when the Japanese brand arrived in the UK with just one model and a car advert that involved a stack of Champagne glasses and a revving engine, Autoblog has conducted a special test.

We've got our hands on the original motor show car that helped launch the marque here, the LS400, and pitched it against its spiritual successor, the very green and very expensive LS600h. Here's what 20 years of development has done for the Mercedes S Class rival.