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Two common definitions used today are the imperial horsepower as in "hp" or "bhp" which is about 745.7 watts, and the metric horsepower as in "cv" or "PS" which is approximately 735.5 watts. The electric horsepower "hpE" is exactly 746 watts, while the boiler horsepower is 9809.5 or 9811 watts, depending on the exact year.
A typical turbocharged V8 diesel engine might have an engine power of 250 kW (340 hp) and a mass of 380 kg (840 lb), [1] giving it a power-to-weight ratio of 0.65 kW/kg (0.40 hp/lb). Examples of high power-to-weight ratios can often be found in turbines. This is because of their ability to operate at very high speeds.
A high-performance 327 cu in (5.4 L) variant followed, turning out as much as 375 hp (280 kW) (SAE gross power, not SAE net power or the current SAE certified power values) and raising horsepower per cubic inch to 1.15 hp (0.86 kW). From 1954 to 1974, the small-block engine was known as the "Turbo-Fire" or "High Torque" V8.
The 304 has a displacement of 304 cu in (5.0 L), which produced 210 hp (157 kW; 213 PS)(gross rating) in 1970-71 and was built starting in 1970. [20] Output declined yearly thereafter, initially due a shift from SAE Gross to SAE Net horsepower. 1972-75 models were rated at 150 hp (112 kW; 152 PS) (net rating from 1972 onwards).
The HT-HQ advertised power figures for the 253 and 308 were respectively: 185 hp and 240 hp. The SAE Gross figures for these engines was 175 hp and 227 hp. GMH Technical and Engineering literature shows these revised power figures for HJ but it took a while for it to appear in Sales literature - LX Torana release information shows the 4.2L as ...
The inline six-cylinder 71 series engine was introduced as the initial flagship product of the Detroit Diesel Engine Division of General Motors in 1938.. This engine was in high demand during WWII, necessitating a dramatic increase in output: about 57,000 6-71s were used on American landing craft, including 19,000 on LCVPs, about 8,000 on LCM Mk 3, and about 9,000 in quads on LCIs; and 39,000 ...
The LS-7 was later offered as a crate engine from Chevrolet Performance with an officially rated power minimum of 500 hp (373 kW) gross. In 1971, the LS-5 produced 365 hp (272 kW) and 550 lb⋅ft (746 N⋅m), and the LS-6 option came in at 425 hp (317 kW) and 575 lb⋅ft (780 N⋅m).
It was initially rated (SAE gross) at 250 hp (186 kW) with a two-barrel carburetor (referred to as "2V" in engine designations) or 290 hp (216 kW) with a four-barrel (designated "4V"). Emissions compliance led to a compression drop in 1971, and when Ford switched to net power ratings in 1972 power ratings had fallen to 153 to 161 hp (114 to 120 ...