Silver, curved "Jaguar" writing above a centered 12 fitted into a "V" and all-capitalized POWER on a silverish, black background.
The Jaguar V12 engine was only the second engine design produced by Jaguar Cars and was manufactured from 1971-1997. It was available in three distinct versions that were featured in 12 different cars over various periods of production; a standard 5.3 liter version was used in six vehicles between 1971 and 1985, a high efficiency 5.3 liter version used in three vehicles between 1981 and 1992, and a high efficiency 6.0 liter version, used in three vehicles from 1992 to 1997. The V12 was succeeded by the Jaguar AJ-V8, but is considered to be one of the premier engine power plants (featuring both a reciprocating engine and an alternator) of the 1970s and 1980s. The reciprocating engine featured 12 cylinders, allowing more room for pistons to operate. Greater piston area allowed for power to be produced more evenly throughout the engine block, keeping pressure down and allowing for improved torque, better acceleration, and greater engine reliability and longevity.
Source: Norbye, J.P. (1971). Sports cars for the man who has everything. Popular Science, 199(2), p. 52-54. Retrieved from https://goo.gl/yNgyn6 (Google ebook of Popular Science volume 199, issue 2).