We've been yearning for the arrival of the new BMW Z4 ever since the stunning concept was unveiled last year. While we now know the reborn Toyota Supra will finally be shown at Geneva next month, BMW is remaining tight-lipped about when the production version of the new Z4 roadster will break cover. But since both sports car share the same platform, we'd be surprised if it doesn't show up alongside the Supra. Reports are even suggesting the Supra is essentially a rebodied Z4 with the same engine and interior options.

To ease the wait for the final production Z4, our spy photographers have supplied us with the clearest photos yet of the gorgeous roadster. The Z4 was spotted parked next to camouflaged prototypes of the BMW 3 Series and Toyota Supra, allowing our spies to get some good close-up shots. What we're looking at is most likely a production-ready prototype Z4 before its official reveal, as there are no longer any plastic parts underneath and it's only covered with a thin layer of foil, some of which has peeled off revealing the roadster's blue metallic paint. It's also been fitted with production headlights and taillights, and the grille has been updated with BMW's new kidney design.

From what we've seen, the design shouldn't look drastically different to last year's concept, which is a very good thing. The headlights look very similar, but the air intakes look a little less aggressive. Under the hood, reports suggest the base model will be powered by a turbocharged 2.0-liter four-cylinder engine with 180 hp, while a more powerful version will pack 250 ponies. The range-topping Z4 will reportedly come with a turbocharged 3.0-liter straight-six delivering up to 385 hp. Production is expected to start in November, with deliveries due to start early next year.