One of the finest cars built by General Motors, the Cadillac CTS-V has been improved by the tuning firm Hennessey Performance. There’s always room for improvement when you get to work with a factory supercharged 6.2-liter V8 engine. Hennessey Performance has developed the V700 upgrade package to squeeze an extra 150 horses out of the Cadillac CTS-V LSA V8, giving it more than 700 horsepower. It was accomplished with the addition of a cold air induction system, smaller supercharger pulley, new engine management system, longer headers, 3-inch exhaust system, high-flow cats, upgraded intercooler, and more aggressive camshafts. The end result?

A never-before seen concept model and the hottest version of the new CTS-Coupe will be Cadillac’s stars at next month’s Detroit Motor Show. GM’s premium brand released a teaser photo of the new concept model but is keeping everything else, including the name, a secret.

The German tuners from GeigerCars have modified the Cadillac CTS-V as well as several other North American cars such as the Ford and Chevy. Powered by the factory 6.2-liter V8 engine, the new Cadillac received a larger turbo, intercooler, and increases in boost pressure. With all the work under the hood, GeigerCars was able to pull fantastic numbers showing 619 hp at 5,900 rpm, and 850 Nm of torque at only 4,000 rpm. This rocket-like Cadillac CTS-V reached a top speed of 330 km/h with shortened fifth and sixth gears coming from GeigerCars. The tuning company didn’t release the acceleration times yet, but with those figures it’s definitely one of the faster Cadillacs to date.

GeigerCars is a German tuning company specialized in refining North American cars and after a couple of upgrades for Chevys they recently launched an upgrade for the Cadillac CTS-V. The modified CTS-V is powered by the standard 6.2L V8 engine with an intercooler and compressor that received an increased air charge pressure and other upgrades. Thanks to this work under the hood, the car’s engine now produces 619 HP at 5,900 rpm and a maximum torque of 850 Nm at 4,00 rpm.

GM President and CEO Fritz Henderson confirmed today that Cadillac is developing 10 new models through 2011 including an entry-level luxury sports sedan that will compete against the BMW 3-Series and Audi A4 sedans in the segment below the CTS. The announcement was part of a general relaunch of GM that will present a total of 25 new models from now until the end of 2011.

If you are in the market for a larger than life luxury SUV with a hypocritical drop of eco-friendliness, then you may want to take a look at the latest edition of Cadillac’s 2009 Escalade Hybrid, called Platinum. It combines the luxury appointments of the Platinum model with the two-mode hybrid powertrain of the Escalade Hybrid that delivers 20mpg in city driving and 21mpg on the highway.