The straight-6 (also inline 6, I-6, or I6) is an internal combustion engine with six cylinders aligned in a single row. The name slant-6 is sometimes used when the cylinders are at an angle from the vertical. Straight-6 engines have perfect primary and secondary balance and require no balance shaft. Usually a straight-6 was used for engine displacements between about 2.5 and 4 litres. Sometimes this configuration is used to make smaller engines which tend to be powerful and very smooth running, but also rather expensive to manufacture and physically longer than alternative layouts. list of automotive superlatives production straight-6 was found in the 1927 Alfa Romeo 1500, displacing just 1.5 L. The largest was the Cummins Cummins B Series engine at 5.9 L, available in Dodge Dodge Ram trucks since 1989. Straight-six engines were historically more common than V6's, mainly because the length of such engines was not such a concern in rear-drive vehicles but also because V6's (unlike the 90-degree V8) were somewhat difficult to make smooth-running. The widespread use of front-wheel-drive and transverse ("east-west") engine configurations in smaller cars saw that the shorter engine length of the V6 became highly desirable, and these days most six-cylinder engines are made in the V configuration. Many manufacturers build cars equipped with straight six engines. Manufacturers BMW and Volvo both produce multiple models with straight sixes and several automakers have isolated straight-six offering's, such as Suzuki's Suzuki Verona and Ford's Ford Falcon. Most of these cars are rear wheel drive, but both Volvo and Suzuki build cars equipped with front wheel drive and a transverse straight six. Although Mercedes used to build many straight sixes, it has recently given them up and now only engineers V6 engines. BMW, on the other hand, is one of the few remaining manufacturers to persist with the I-6 configuration, making petrol and turbocharger-diesel engines ranging from 2.0 to 3.2 litres in displacement (as of 2005). Toyota also uses straight sixes in some of their sportier cars and large displacement I-6 engines in their Prado off-road vehicles. As far as passenger vehicles are concerned, inline six engines might be making a comeback in some larger vehicle types such as trucks and Sport utility vehicles. == Straight 6 engines in the United States == Engines of this type were popular before World War II in mid-range cars. Most manufacturers started building straight 6 engines when cars grew too large for the straight-4, although Ford Motor Company went straight to the V8. After the war, larger cars required larger engines, and the straight-6 became the base engine model used on economy cars only. The vast majority of American cars during this period had V8s. The Chrysler Corporation had noteworthy Chrysler Slant 6 engine, used in the Plymouth Valiant and Dodge Dart models of the 1960s and 1970s. When cars began to get smaller again in the 1970s, the trend was towards the greater compactness enabled by the V6 layout, and straight 6 engines became rare in American cars except for trucks and vans. Jeeps were an exception to the rule, getting the AMC Straight 6 engine as the base engine option in 1972, and getting a high-performance AMC Straight 6 engine#4.0 option in 1987. In 2001 General Motors introduced a new family of straight engines, the ''GM Atlas engine'', for use in the newly-introduced Chevrolet TrailBlazer/GMC Envoy. The I-6 was chosen for development because of the desirable operating characteristics of its self balanced design. This engine is also to be used in the new Saab 9-7. In 1959 Saab Automobile had an experimental car with ''two'' transverse straight-3 engines bolted together—the Saab Monster. == British straight-6 engines == The straight 6 was the archetypal British engine for sports and luxury cars for many years. Rolls-Royce used straight-6 engines until changes in their design make the shorter V8 layout more suitable. Jaguar (car) used them until, at Ford's insistence they adopted a V8. Aston Martin used a straight 6 for many years as well. Bristol Cars produced a straight 6 until 1961, based on BMW plans, that was also used in many small manufacturers' cars. TVR also uses a straight 6 called TVR Speed Six engine in some of their coupes and convertibles such as the TVR Tuscan. == Diesel straight-6 engines == The inline 6 in diesel engine form with a much larger displacement is commonly used for various industrial applications. These range from various types of heavy equipment to power generation. As with everyday passenger vehicles, the smooth running characteristics of the I-6 engine is what makes it desirable for industrial use. In addition, an I-6 engine is mechanically simpler than a V6 or V8. It has only one cylinder head and half as many camshafts as a V engine. See also: straight engine Piston engine configurations
I removed the passage about bad low rpm torque of small sixes, because it is simply not connected to the straight six principle per se, but rather to things like cylinder bore to stroke ratio. For the same ratio, a six is better than a four. The old Triumph 2000cc straight six had very good low rpm torque, as an example. User:Egil 06:50 Apr 25, 2003 (UTC) ---- The Suzuki Verona FWD midsize sedan has a 2.5L i6 - think it's worth a mention? :As rare as inline sixes are these days, it probably is, especially in that kind of car. --User:Morven 06:47, 21 Sep 2003 (UTC) ::Added the Verona bit - sounds like a decent car. It's apparently meant to compete with other manufacturers i4's (in price and power), while being smoother and providing better side-to-side weight balance. -- User:Stewacide
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Words begining with Straight-6:
Straight-6
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Straight-6
The straight-6 (also inline 6, I-6, or I6) is an internal combustion engine with six cylinders aligned in a single row. The name slant-6 is sometimes used when the cylinders are at an angle from the vertical. Straight-6 engines have perfect primary and secondary balance and require no balance shaft. Usually a straight-6 was used for engine displacements between about 2.5 and 4 litres. Sometimes this configuration is used to make smaller engines which tend to be powerful and very smooth running, but also rather expensive to manufacture and physically longer than alternative layouts. list of automotive superlatives production straight-6 was found in the 1927 Alfa Romeo 1500, displacing just 1.5 L. The largest was the Cummins Cummins B Series engine at 5.9 L, available in Dodge Dodge Ram trucks since 1989. Straight-six engines were historically more common than V6's, mainly because the length of such engines was not such a concern in rear-drive vehicles but also because V6's (unlike the 90-degree V8) were somewhat difficult to make smooth-running. The widespread use of front-wheel-drive and transverse ("east-west") engine configurations in smaller cars saw that the shorter engine length of the V6 became highly desirable, and these days most six-cylinder engines are made in the V configuration. Many manufacturers build cars equipped with straight six engines. Manufacturers BMW and Volvo both produce multiple models with straight sixes and several automakers have isolated straight-six offering's, such as Suzuki's Suzuki Verona and Ford's Ford Falcon. Most of these cars are rear wheel drive, but both Volvo and Suzuki build cars equipped with front wheel drive and a transverse straight six. Although Mercedes used to build many straight sixes, it has recently given them up and now only engineers V6 engines. BMW, on the other hand, is one of the few remaining manufacturers to persist with the I-6 configuration, making petrol and turbocharger-diesel engines ranging from 2.0 to 3.2 litres in displacement (as of 2005). Toyota also uses straight sixes in some of their sportier cars and large displacement I-6 engines in their Prado off-road vehicles. As far as passenger vehicles are concerned, inline six engines might be making a comeback in some larger vehicle types such as trucks and Sport utility vehicles. == Straight 6 engines in the United States == Engines of this type were popular before World War II in mid-range cars. Most manufacturers started building straight 6 engines when cars grew too large for the straight-4, although Ford Motor Company went straight to the V8. After the war, larger cars required larger engines, and the straight-6 became the base engine model used on economy cars only. The vast majority of American cars during this period had V8s. The Chrysler Corporation had noteworthy Chrysler Slant 6 engine, used in the Plymouth Valiant and Dodge Dart models of the 1960s and 1970s. When cars began to get smaller again in the 1970s, the trend was towards the greater compactness enabled by the V6 layout, and straight 6 engines became rare in American cars except for trucks and vans. Jeeps were an exception to the rule, getting the AMC Straight 6 engine as the base engine option in 1972, and getting a high-performance AMC Straight 6 engine#4.0 option in 1987. In 2001 General Motors introduced a new family of straight engines, the ''GM Atlas engine'', for use in the newly-introduced Chevrolet TrailBlazer/GMC Envoy. The I-6 was chosen for development because of the desirable operating characteristics of its self balanced design. This engine is also to be used in the new Saab 9-7. In 1959 Saab Automobile had an experimental car with ''two'' transverse straight-3 engines bolted together—the Saab Monster. == British straight-6 engines == The straight 6 was the archetypal British engine for sports and luxury cars for many years. Rolls-Royce used straight-6 engines until changes in their design make the shorter V8 layout more suitable. Jaguar (car) used them until, at Ford's insistence they adopted a V8. Aston Martin used a straight 6 for many years as well. Bristol Cars produced a straight 6 until 1961, based on BMW plans, that was also used in many small manufacturers' cars. TVR also uses a straight 6 called TVR Speed Six engine in some of their coupes and convertibles such as the TVR Tuscan. == Diesel straight-6 engines == The inline 6 in diesel engine form with a much larger displacement is commonly used for various industrial applications. These range from various types of heavy equipment to power generation. As with everyday passenger vehicles, the smooth running characteristics of the I-6 engine is what makes it desirable for industrial use. In addition, an I-6 engine is mechanically simpler than a V6 or V8. It has only one cylinder head and half as many camshafts as a V engine. See also: straight engine Piston engine configurations
Straight-6
I removed the passage about bad low rpm torque of small sixes, because it is simply not connected to the straight six principle per se, but rather to things like cylinder bore to stroke ratio. For the same ratio, a six is better than a four. The old Triumph 2000cc straight six had very good low rpm torque, as an example. User:Egil 06:50 Apr 25, 2003 (UTC) ---- The Suzuki Verona FWD midsize sedan has a 2.5L i6 - think it's worth a mention? :As rare as inline sixes are these days, it probably is, especially in that kind of car. --User:Morven 06:47, 21 Sep 2003 (UTC) ::Added the Verona bit - sounds like a decent car. It's apparently meant to compete with other manufacturers i4's (in price and power), while being smoother and providing better side-to-side weight balance. -- User:Stewacide
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Straight-6
Straight-6
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