For generations, Bentley had operated under the philosophy that bigger is always better. But in today's environmentally conscious world, economy has become as important as speed and luxury. The time is now for the iconic British car manufacturer to reinvent itself, as well as its signature machine, the Continental GT. Take a grand tour through time as we examine the history of Bentley and see how its designers and engineers have evolved its flagship into a faster, lighter, more fuel-efficient machine.

It is a car that never should have been born. It wasn't strategically rational. It wasn't financially plausible. It wasn't even corporately approved. And yet, a team of designers, engineers, and craftsmen secretly built it anyway. The stealth project's name: the Dodge SRT Viper, the fifth generation of the model, built at the height of the 2008 economic collapse and during one of the company's darkest hours. Witness the long trek and massive challenges involved in reinventing and bulking up one of the most powerful American supercars ever made.

For over 100 years, Porsche has built exceptional gas-powered sports cars. However, in the early 21st century, fossil fuel consumption comes under fire, and fuel economy moves to the forefront of consumers' minds. The survival of the Porsche requires reimagining the very concept of the sports car. Their answer: the Porsche 918 Spyder, the first true hybrid supercar, a leaner, greener 887-horsepower supercar with a top speed of 211 mph and the ability to blast from 0-60 in less than 2.8 seconds. And the cost: a mere $845,000.

Maserati has taken on the nearly impossible challenge of growing its business from 6,000 sales a year to 50,000. Their solution: to shrink its top-selling Quattroporte into a sportier and more affordable package called the Ghibli. Witness the company's attempt to add a touch of Italian flair to the mid-size sedan market as we track the design, planning, and manufacturing of this $70,000, 404-horsepower speedster. It's a bold gamble for Maserati, and the future of the century-old brand hangs in the balance.

It's the most famous bull in the automotive industry, a brand that is synonymous with high-performance exclusivity. Since 1963, Lamborghini has chased one dream: to build exotic, handcrafted, high-end Italian machines for the ultra-wealthy. Their latest machine, the Huracan, is a 610-horsepower beast, with a top speed of 202 mph and the ability to blast from 0-60 in just 2.5 seconds. Witness its creation and the major risks and challenges the company faced to bring this sleek, stealth, $256,000 supercar from the factory to the fast lane.

For five decades, the Ford Mustang has changed the way Americans drive, offering a sporty, affordable, and powerful ride. The next generation of the original pony car has been in production for nearly a decade, an eternity in the automotive world, and the pressure is mounting to roll it out. Witness the rush to build the most important 'Stang ever: a 50th Anniversary machine intended to go global for the very first time, and one that must captivate a new market without alienating its original fan base.