What's the largest engine in the world? Well, it depends from how you look at it. Thankfully, we have dedicated Jalopnik readers to help us finding the right answers.

This is the GE90-115B, the world's biggest jet engine. It's 18 feet long, 11.25 feet wide, and it weighs 18,260 pounds. It's set a world record for producing 127,900 lb_f of thrust. Can you find a bigger engine?

The Toyota 1GZ-FE is the only Japanese V12 automotive engine in production. It powers the second generation of Toyota's flagship Century four-door limousine, and also found it's way into a Supra with two turbos on top. That's good for about 1000 horsepower.

Truth be told, I have absolutely no idea how these trumpet air intakes work or why classic 1950s and 1960s sports racing cars have them. I do know that they look frikkin' righteous.

Clarifying earlier reports that the new Fusion would get a 1.5-liter engine, Ford confirms they cut 0.1 liter from the previous 1.6 unit's displacement, used some engineering magic, ended up with 20% better fuel economy and about 15% less emissions while maintaining power figures. Also, they save you some tax money.

You can only get the Audi R8 V10 Plus in coupe form, and there are 550 good reasons for foregoing the droptop in that fantastic engine. With its tuned suspension, carbon bits and 3,461 lb curb weight, this is definitely a car for some track attack on the weekends. For the ultimate laptime, just think of Colin Chapman,…

There was little else to the Matra MS11 than a humongous French V12 which wasn’t very good. But all the car needed was a bit of old-school French engineering. A year later the MS80, its sucessor, sailed Jackie Stewart to his first F1 title. (Photo by al_green)

The velocity stacks on Steve McQueen’s chestnut brown 1963 Ferrari 250 GT Lusso. This is what you got when you had money to blow on cars fifty years ago: lots and lots of little exposed screws. You like, yes?

American V8s are pretty awesome. They've been the muscles of U.S. car culture since Bonnie and Clyde first floored their Ford Model B. They're the ultimate answer in the eyes of the costumers when it comes to the question of performance.