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The Hemi-6 is a pushrod O.H.V. (overhead valve engine), with combustion chambers comprising about 35% of the top of the globe. This creates what is known as a low hemispherical shaped chamber. In this way, the "Hemi" moniker was used for the same kind of marketing cachet as Chrysler's 1950s-1970s Hemi V8 engines.
Chrysler developed its first experimental hemi engine for the Republic P-47 Thunderbolt fighter aircraft. The XIV-2220 was an inverted V16 rated at 2,500 hp (1,860 kW). The P-47 was already in production with a Pratt & Whitney radial engine when the XIV-2220 flew successfully in trials in 1945 as a possible upgrade, but the war was winding down and it did not go into production.
2003–present: Hemi. 5.7L Hemi - The smallest modern Hemi engine, called the Eagle, introduced in 2002. 6.1L Hemi - A larger modern Hemi, 2004–2010. 6.4L Hemi - A larger bore modern Hemi engine, called the Apache, introduced in 2011. 6.2L Hemi - A supercharged Hemi engine, called the Hellcat, introduced in 2014.
An SRT version was unveiled at the 2011 New York International Auto Show, featuring the 6.4 L 392 Hemi V8 engine. The 6.4 L 392 Hemi engine is also used in other Chrysler Group SRT vehicles such as the Dodge Charger and Challenger. With 470 hp (350 kW), the new 300 SRT can go from 0 to 60 mph (97 km/h) in the low 4-second range. [49]
6.2L supercharged Hellcat HO Hemi V8: 797 hp 3.6 seconds 10.8 seconds Dodge Charger SRT Hellcat Redeye: 2021–2023 Dodge Challenger SRT Jailbreak: 2022 807 hp 3.6 seconds 11.0 seconds Dodge Charger SRT Jailbreak: 2022 3.6 seconds 11.0 seconds Dodge Challenger SRT Demon: 2017–2018 (Limited to 3,500 cars) 6.2L supercharged Demon Hemi V8
But in 1965 the 300M was revived, this time powered by the 425 hp (317 kW), 426 Hemi engine and a planned production run of 4298, of which 500 were to have the Hemi engine, a $1250 option. The Hemi cars would also feature a dual-faced "7-Liter Hemi" medallion.
A total of 1,907 A12 M-code 440 Six Pack 1969 1/2 Dodge Super Bees were produced. This option fell half-way between the standard engine and the Hemi as a US$463 option. The 1969 model year included the base 383 Magnum, 440 Six Pack, and the 426 Hemi. The 440 Magnum (4bbl) was reserved for the Coronet R/T.
The Maserati Biturbo was an executive grand tourer that was to compete mainly with the BMW 3 series, but earned a negative reception for its new twin-turbocharged engine, which led to unpredictable power delivery through its turbo lag, and its numerous reliability problems.