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New rear wheel drive Cadillac super sedan coming in 2015

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The Cadillac XTS has stormed onto the full size luxury car scene, doing a fine job of replacing both the STS and the DTS in terms of luxury and spaciousness but reports indicate that GM’s luxury line is planning a new full size, rear wheel drive flagship sedan that will take aim at the BMW 7 Series.

It is no secret that to truly compete in the luxury segment, you have to be able to compete with BMW and with the introduction of the new Cadillac ATS, General Motors has made great strides to do just that. The next generation Cadillac CTS is expected to grow a bit to take on the BMW 5 Series head to head while the new ATS will do battle with the top selling 3 Series. However, when it comes to a proper range-topping luxury car with tons of power and a rear wheel drive configuration – GM has no answer for the likes of the BMW 7 Series. However, Automotive News reported that the General is currently working on a new rear drive flagship sedan that will give them a chance to attract the same buyers who may look to purchase a new BMW 7 Series.

Little is known about the new rear wheel drive Cadillac flagship sedan but in addition to the rear wheel drive configuration; this unnamed new model will likely feature a beefy American V8 like a proper Caddy flagship should. However, to fully take aim at the BMW 7 Series, we would expect that the new RWD Cadillac would also feature the company’s popular 3.6L V8 that is currently at work in every modern Cadillac model. Rumors suggest that the new rear drive Caddy would arrive for the 2015 model year so there very well could be a new engine that arrives in place of the current 3.6L V6 but the base engine for the new model will likely be based on the current V6.

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The BMW 7 Series comes equipped with either a twin turbocharged 3.0L inline-6 that makes 315 horsepower or a twin turbocharged 4.4L V8 that makes 445 horsepower. The 3.6L V6 that GM currently uses in a huge spread of products is capable of making better than 315 horsepower (example, the Chevrolet Camaro with 323hp) so that motor – or some version of it – would do a fine job of competing with the BMW inline-6. The biggest question is how will GM power the new Cadillac flagship rear drive sedan to compete with the twin turbo 4.4L BMW engine? Cadillac could call on the 6.2L V8 that is standard in the Chevrolet Corvette which makes 436 horsepower when fitted with a dual mode exhaust system but that would make the new Caddy slightly less powerful than the BMW 750i. The next realistic engine option (figuring that GM will not use the 7.0L LS7 from the Corvette Z06) would be the supercharged V8 used in the Cadillac V-Series, the Chevrolet Camaro ZL1 and the Chevrolet Corvette ZR1. GM could put together a detuned version of that V-Series engine that would offer slightly more power than the BMW twin turbo V8 but the other, more interesting possibility is that the new Cadillac flagship V8 does not yet exist.


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