1972 Porsche 911t Targa Viper Green A/c on 2040-cars

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'Latest production version' of Porsche 918 shown off on Twitter

Porsche posted a picture of what it is calling "the latest production version" of the 2015 Porsche 918 Spyder on Twitter. It looks like the gasoline-hybrid supercar is being driven sportively on some California back roads during Monterey Speed Week.
Whatever updates were made to this version aren't visual (except for the paint), as the one Chris Harris drove last spring and another seen hot-weather testing in Nevada both had production bodies. We presume the changes are relatively minor and more than skin deep - perhaps brake calibration, suspension tuning or tweaks to the powertrain - but Porsche didn't release any more information.
The 918 Spyder is Porsche's latest supercar, which will compete with the LaFerrari and the McLaren P1 hybrid supercars. The Porsche may be the underdog of the group when considering horsepower, acceleration, top speed and price, but the 887-horsepower brute has the most advanced hybrid drivetrain of the three.

Porsche planning Cayman GT4 racer

To say that Porsche is big in racing is like saying that Warren Buffett dabbles in mergers and acquisitions. But while it fields the 919 Hybrid at Le Mans and in the FIA World Endurance Championship, the bulk of its racing activities are undertaken by private teams that buy customer racecars from the factory. Those in turn are largely based on the 911, but the latest intel from the motor racing world indicates that Zuffenhausen is planning a more accessible customer race car.
The new, more affordable competition car is to be based on the Cayman and built to GT4 specifications, slotting in below the 911-based GT3 Cup, GT3 R and RSR. Autosport reports that Porsche has already developed a prototype and will shortly commence testing. Details are scarce at the moment, but the Cayman GT4 would seem to compete against the likes of the Aston Martin Vantage N24, Nissan 370Z Nismo GT4 and Maserati GranTurismo MC. It will also likely help Porsche foster enthusiasm for a potential road version that's already been spotted undergoing testing. Previous GT4 racing conversions of the Cayman, like the one pictured above, were carried out by third-party racing constructors not recognized by the factory.
Porsche may not be the only one showing interest in the category, however. BMW is said to similarly be considering a GT4-spec version of its M235i Racing model to compete in the same class, taking the place of the defunct M3 GT4 as the Bavarian marque's entry-level customer racing car.

See what the Chevy C7 ZR1 may be benchmarked against

One of the greatest things every Corvette has had going for it, and also one of the most re-used arguments against it, is its price-to-performance equation - long before the Nissan GT-R became the de facto Porsche 911 comparator the Corvette spent decades as Exhibit A. Depending on which side of the argument you stressed, supporters crowed about how much performance you got for how (comparatively) little, detractors carped on how little you got everywhere else in the bargain.
It appears Chevrolet is working as hard as ever to render the argument meaningless. Spy shooters at KGP captured a convocation of European birds of prey leaving the General Motors test center, and aimed at benchmarking the C7 Corvette ZR1. The road train comprised of two C7 Corvette Stingrays, a 2013 Corvette ZR1, McLaren MP4-12C, Ferrari 458 Italia, Audi R8 V10 Spyder and Porsche 911 Carrera S and it was last seen heading down the same kinked-up back roads used to hone the Corvette Stingray.
The C7-series ZR1 and its possible 700 horsepower are still a ways off. If it really is being positioned to compete with the celestial exotica in the testing group, could it be the first Corvette to regularly be the first answer to the question "Cost no object, which would would you rather have?"