Lexus has more than 20 years' experience producing hybrid models, but the RZ 450e is its first dedicated battery electric vehicle (BEV) and is built on the same dedicated platform (e-TGNA) as the Toyota BZ4X.

The RZ 450e logically fits in between the Lexus NX and RX models in terms of size. Outside, the styling is best described as an evolution of its "Next Chapter" design, with themes first seen on models such as the NX. The biggest change is at the front of the RZ, as the signature spindle grille is no longer needed for cooling, so it is integrated into the complete frontal design. Although textured at the edges, it gives the front a very solid look, but in our view works with some colours better than others.

The RZ 450e looks most interesting from the side - where its 2,850mm wheelbase, short overhangs, plus the striking surface detail on the doors really stands out. Then, there's the unusual way the window line arches towards the rear, the way the high-set rear light clusters sitting proud of the rear quarters, plus the choice of 18in and 20in wheels to draw the eye.

This leads on to the back of the Lexus, which is no less distinctive, with plenty of angles in the rear bumper and diffuser, a subtle boot spoiler and a roof spoiler that almost looks like 'ears,' perched on both sides of the roof. All this and a fully covered underfloor, equals a slippery 0.263Cd drag coefficient figure, which contributes to this Lexus's energy efficiency.    

Inside the RZ's interior is an evolution of Lexus's Tazuma concept, where screens and controls are brought together, with only small movements of the hand and eye needed to operate vehicle systems and access information. It works (mostly) as the large 14in infotainment touchscreen which dominates the dashboard is angled towards the driver and close to the smaller screen in front of the driver. The new radiant heater fitted under the dashboard works very well - especially for front passengers as it's more powerful - but you do lose the glove box.

The screen menus too are simple, featuring Apple and Android connectivity, but we wonder why the drive modes are lost in one of these menus, making them hard to change on the move! Elsewhere, the switchgear is generally chunky and easy to operate. Although considering the size of the infotainment screen, it's a shame Lexus didn't fit a bigger screen that completely fills the space in front of the steering wheel.

The RZ 450e has a comfortable driving position, and the seats are supportive. With a glass roof it feels airy and can be turned opaque at the touch of a button on the range-topping Takumi spec. The quality too, as expected, feels impressive and the faux-leather trim is convincing. Rear legroom also impresses and the 522-litre boot is practically shaped and can be extended to 1,451 litres with the rear seats folded.

The RZ 450e is powered by a long-life 71.4kWh lithium-ion battery, which Lexus claims will be durable enough to retain 90% capacity - even after 10 years of driving. This Lexus is also the first model to be fitted with its new e-axles, that feature compact power units front and rear - which work in conjunction with the also new Direct4 all-wheel drive torque control. Although the RZ450e can be front, rear, or all-wheel driven. The front power output being 204hp, with the rear less at 109hp and a total of 313hp.

It is no sports car but feels sprightly off the mark. The handling is also tidy with plenty of grip. The 18in wheels equal more range (272 miles) but also more road noise. Surprisingly, the bigger 20in are quieter, with seemingly no negative effect on the ride - although you do lose 20 miles of range! It was cold when we drove these early RZ 450e models, so it seems unfair to comment on the range until we drive a UK production version.