The ongoing yarn about General Motors fielding a brace of rear-wheel drive flagship sedans based on a new generation Premium Zeta platform has hit the big time, with Motor Trend reporting that the platform will underpin a sport sedan for Chevrolet. Last month, the rejigged Zeta was touted as the basis for a flagship Buick that would finally, and properly, challenge Lexus. MT's report says there will be two wheelbases for this new Zeta, and that those two variants will do duty under a Cadillac, a U.S. Buick and potentially a Chinese-market Buick, and several Holden models along with the aforementioned Chevy.

As the basis for premium sedans, General Motors could spend the money to make it properly light and strong through the use of high-strength steels. The Chevy sport sedan mentioned would be "a kind of four-door Camaro" – Pontiac G8 GXP redux, anyone? – while the Buick only gets described as "cushier," and both would go on the shorter wheelbase Zeta.

The most interesting tidbit could be Cadillac's use of the long-wheelbase platform. MT prices a Cadillac flagship at between $125,000 and $140,000 and says the Zeta-based Cadillac, Whitacre's S-Class rival for the Crest-and-Wreath brand, will sit beneath it. If it all comes to pass, that would give Cadillac a larger CTS, then an XTS, then a properly sporting high-end luxury competitor, then a one-Caddy-to-rule-them-all ne plus ultra model by 2014 or so. Hat tip to Joshua!

[Source: Motor Trend]

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