2015 Mustang: Four-cylinder in, Shelby out?

New details have emerged on Ford's upcoming 2015 Mustang. The all-new Mustang promises a host of upgrades that should bring the original pony car into the 21st century.

There has been much debate about the 2015 Mustang's powertrains, but Road & Track seems to have sorted everything out.

The base 2015 Mustang will continue to be offered with a V6 engine. Power should remain similar to the Mustang's current ratings of 305 horsepower and 280 lb-ft or torque.

In a bit of a twist, Ford will offer an EcoBoost turbocharged four-cylinder as the Mustang's mid-level engine. Although down on cylinders compared to the V6, the four-banger should produce 350 horsepower and 300+ lb-ft of torque. No word yet on whether Ford plans to brand the four-cylinder Mustang as the SVO.

Ford's 5.0L Coyote V8 will continue to power the 2015 Mustang GT, but power should grow from today's 420 horsepower to 450 horsepower.

Perhaps most intriguing, Ford will reportedly drop the Shelby moniker from the top-spec version of its 2015 Mustang. It still remains unclear what nameplate the car will wear, but 'Cobra' seems to be the early front runner.

The current Shelby GT500 comes equipped with a supercharged V8 engine, but that probably won't be the case for the next-generation Cobra. Look for the next Mustang range-topper to use all engine to generate eye-popping performance figures, similar to what Chevrolet has done with the Camaro Z/28.

Lastly, the 2015 Mustang will ditch its old school solid rear axle for a modern independent setup.

Look for the 2015 Ford Mustang to break cover sometime next year.