Horsepower is characterized as work done after some time.
Whether you're buying a new car or building a hot rod in your garage, two factors come into play when determining engine performance: horsepower and torque.
Horsepower may steal a lot of headlines, but the always-more-complex torque figure is often a critical one for both the workingman and the motoring playboy. The measure of rotational force is a function of horsepower and engine rpm, and it's also the twist that can liquefy one's tires or haul one's horse trailer. Good stuff
A UC Davis white paper maps out "Three Routes Forward for Biofuels," balancing investment risk with carbon benefits. The first option is "incremental," in which we tinker with the existing biofuel manufacturing infrastructure for small improvements over time. The "transitional" plan suggests integrating cellulosic production and other innovations with existing operations. The third route, called "leapfrogging," would mean building refineries based on new technology such as cellulosic and algae-b
Treehuggers and gearheads unite! Long viewed as primarily the green-car enthusiast's domain, electric vehicles can actually be just as satisfactory for pedal-mashers, provided that there's a charging system nearby, writes Blake Herrschaft for the Rocky Mountain Institute.
Could all of the work some automakers are doing to increase diesel engine adoption in the US be going up in a cloud of smoke? Maybe so, as torquier and more fuel-efficient gasoline engines and cheapening hybrid technology are cutting into what had been perceived as the advantages of diesel drivetrains, the Detroit News says.
The recall bug has struck Nissan, but fortunately it appears the Japanese automaker caught the problem early on. The National Highway Traffic Safety Administration says on its website that Nissan is recalling 20,000 copies of the 2011 and 2012 Altima built between April 25 and June 10 due to a suspension bolt that may not have been torqued to specification.
Audi e-tron concept - Click above for high-res image gallery
To assist their gas engines, Nissan has developed e-4WD, or electric four wheel, which uses electric motors but has no batteries. Is this a hybrid? Yeah. Think of it as a mild series or serial hybrid, which is a kind of hybrid that uses a generator instead of a battery to power the electric motors. Wait a minute, you might say: aren't four wheel drives less efficient than two wheel drive cars? Yes but e-4WD is very light and compact because it's electric.
Lexus is billing the IS-F as "Everything you thought we weren't," and the potential is certainly there. The engine bay is filled with 5 liters of 4-valve V8 putting out 416 horsepower and 371 pound-feet of torque. The Minilite-esque wheels hide a Brembo braking system with six piston front calipers and cross-drilled rotors 14.2 inches in diameter. The sill extensions wrap up the front fenders to form a styling detail reminiscent of extractor vents, and the rest of the body has been tweaked in th
Siemens VDO has announced that for the first time an engine equipped with piezo direct injection gasoline (DIG) technology has featured in Ward's 10 Best Engine List of 2007. The 300 hp / 224 kW BMW 335i Twin Turbo 3-liter engine, which features Siemens VDO DIG technology, was unveiled at the Geneva Auto Show last year.
More powerful than a locomotive? That's what the folks over at Diesel Power are predicting for the future of trucks. Cars and trucks have become more powerful over the years, with today's torque figures dwarfing the 420 ft.-lbs. of torque figures commonly seen in trucks in the mid-1990s. While many factory numbers hit above 500 ft.-lbs. and aftermarket parts can launch drivers above 1,000 ft.-lbs., we have to be nearing the threshold of how big and bulky the transmissions can get and still be ef
Over the years, the big two-point-five may have lost market share to their overseas counterparts, but one segment that no foreign manufacturer can touch is Detroit's diesel pickup offerings. With that in mind, GM and Ford will announce the power ratings of their newest oil burners during, where else, the Texas State Fair.
Conventional wisdom says that continuously- or infinitely-variable transmissions (CVT and IVT, respectively) are destined to toil away under the hoods of compact cars, but Torvec is having none of it. The manufacturer recently installed its hydraulic-based IVT behind the Cummins turbodiesel of a 2004 Dodge Ram 2500 as a proof-of-concept demonstrator. While the primary application for the Torvec IVT is said to be school buses and other medium-duty vehicles - especially those engaged in a heavy am
Weber Automotive, a leader in the manufacture of engine blocks and crankshafts (many of the magnesium VW Beetle engine blocks were cast by Weber), has designed a small V4 engine in an attempt to provide an alternative to inline fours in emerging markets such as China.