2015 SLS AMG GT Final Edition. Photo: Mercedes-Benz. 

Like all good things, the run of Daimler's (MBGA.F -1.05%) Mercedes-Benz SLS AMG is coming to an end. While this is sad news for Mercedes enthusiasts, there is a silver lining: Mercedes is currently working on a new AMG sports car, and it's rumored to rival Volkswagen's (VWAGY -1.11%) Porsche 911 Turbo. Even better? It's significantly cheaper than you'd expect.

The AMG sports car
Mercedes' new sports car is still being developed under the codename "C190," but here's what we know. First, thanks to spy shots, the C190's look is said to be similar to the SLS but is significantly shorter. In addition, the C190 will have conventional doors, is a pure two-seater, and is said to be the first Mercedes that'll be powered by a new twin-turbocharged 4.0-litre modular V8, which is rumored to produce close to 500 horsepower.

More importantly, with that much horsepower, the C190 is close to Porsche's 2014 911 Turbo, which has 520 horsepower. And that's not the only way Mercedes hopes to challenge the 911. Auto Car reports that a Mercedes source hinted that the C190 will go 0 to 62 in "well under 4.0 seconds," will have a top speed of 190 mph, and will get around 30 mpg. And it'll be priced slightly above $100,000 -- still incredibly expensive, but nowhere near the 2014 SLS' MSRP of $208,000. Moreover, with this price Mercedes is hoping to see significant volume -- relative to a high-priced sports car, that is.

Porsche 911 Turbo. Photo: Porsche.

The 911 takedown?
The 911 Turbo is truly an impressive car. In fact, the BBC's TopGear said that it's "perhaps the ultimate everyday supercar." Coming from TopGear, that's quite a compliment. In addition, the 2014 911 Turbo has a starting MSRP of $148,300, can go 0 to 60 in 3.2 seconds, and has a top track speed of 195 mph. Consequently, the C190 will face stiff competition if it hopes to win sales from the 911 Turbo -- and make no mistake, these two cars will compete for sales.

Though it's too soon to tell which car will come out on top, it's highly unlikely the C190 will destroy the 911 Turbo. Porsche has a strong following, and while the C190 could put a damper on 911 Turbo sales, it's highly unlikely that the C190 will completely take over.

What to watch
Regardless of who wins the title of "ultimate everyday supercar," both Mercedes and Volkswagen have seen incredibly strong sales this year and have significant growth possibilities going into 2014. Volkswagen boasts significant market share in China, which is one of the fastest-growing luxury auto markets, and Mercedes has also seen its brand gain significant traction. Even better for Mercedes is that as 2013 draws to a close, the title of top-selling luxury-auto brand in the U.S. looks like a lock. Consequently, both of these auto manufacturers could make great additions to your investing portfolio.