THERE’S an old saying about books and covers, and for good reason. Lexus has a number of excellent tomes on its shelves, which means some others will be overlooked.

One such car is the GS sedan. Launched in 2012, it has never troubled the sales scorers overly much a resurgent large luxury sector and a package that wasn’t perhaps quite as polished as its German rivals like the Mercedes-Benz E-Class saw the GS overlooked on the sales floor.

The decision to add a small turbo engine has raised some eyebrows – surely the aim of a large-ish luxury sedan is to radiate refinement, and a small-capacity four-cylinder turbo engine does not, as a rule radiate refinement.

Lexus went ahead and did it anyway, and has produced one of the surprises of the 2015 model year.

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