Question: Which came first, the W12 engine or the VR6 engine?

<P0-S0> A W12 engine is a twelve cylinder piston internal combustion engine in a W configuration. <P0-S1>  W12 engines have been manufactured in two distinct configurations. <P0-S2>  The original W12 configuration used three banks of four cylinders coupled to a common crankshaft, with 60° angles between the banks. <P0-S3>  These were used in several aircraft engine designs from the 1920s, notably the Napier Lion and various French engines. <P0-S4>  The more recent configuration, used in the Volkswagen Group W12, uses four rows of three cylinders merged into two 'cylinder banks' (two narrow-angle VR6 engine blocks), coupled to a common crankshaft. <SEP> <P1-S0> The High Value engine family from General Motors is a group of Cam in Block or "Overhead valve" V6 engines. <P1-S1>  They use the same 60° vee bank as the 60° V6 family they are based on, but the new 99 mm bore required offsetting the bores by 1.5 mm away from the engine centerline. <P1-S2>  These engines (aside from the LX9) are the first cam in block engines to implement Variable Valve Timing, and won the 2006 Breakthrough Award from "Popular Mechanics" for this innovation. <P1-S3>  For the 2007 model year, the 3900 engine features optional displacement on demand or "Active Fuel Management" which deactivates a bank of cylinders under light load to increase highway fuel economy. <P1-S4>  It was rumored GM would produce a 3-valve design, but that never came to be. <P1-S5>  These engines were produced primarily at the GM factory in Tonawanda, New York and at the Ramos Arizpe engine plant in Mexico. <P1-S6>  The assembly line for this engine was manufactured by Hirata Corporation at their powertrain facility in Kumamoto, Japan. <SEP> <P2-S0> At first the model had a new petrol engine with 1395 cc and 29 kW (39 hp) at 3800 rpm to 1400 Fiat, and had a manual 4-speed transmission. <P2-S1>  It therefore retained its loyal following who forgave its manageable liveliness out of habit, especially as it came with start-up to a peak of over 90 km/hr and thus was significantly faster than the Fiat 615 with its maximum of 78 km/hr. <P2-S2>  The export ran well at the beginning, missing, or half-hearted development left the Fiat 615 N (and especially its successor) over the years become increasingly rare even in Italy. <P2-S3>  With high pressure, therefore a suitable diesel engine was developed by Fiat: a swirl chamber engine (Ricardo System) based on the 1.9 liter engine for the "big" Fiat in 1900 and the new SUV Fiat Campagnola. <P2-S4>  However, not as the beginning of the Fiat, with the 1.4 L 4-cylinder engine, but with the much stronger torque 1.9 liter engine (type 105) with 47 hp at 3500 RPM, as well as in the, also at Zastava built under license, Campagnola was used. <P2-S5>  It was powered by the engine of the prior year featured Fiat 1400s. <P2-S6>  Once in motion, the Fiat 615 was indeed 80 km/hr fast, but with forced driving it had poor fuel efficiency. <P2-S7>  The Fiat 615 N was a very modern vehicle that in Italy, initially had no competition. <P2-S8>  (This engine was a hubvergrößerte variant of the 1400 engine.) <P2-S9>  Although the experiment of the Fiat 615 built 1.9 L gasoline engine proved to be stronger and with faster drive spurt, confined themselves to the diesel, the Type 615 N. Only Steyr in Austria until 1958 offered the Fiat 615 as gasoline, as Steyr 260 with its own 50 hp 2 L gasoline engine from the car Steyr 2000. <P2-S10>  There was a reason that the 1100 Fiat ELR far built until 1954. <P2-S11>  In Zastava in Yugoslavia, the Fiat 615 was built with a petrol engine under license. <P2-S12>  The new diesel engine (type 305) was later also available in either sedan 1400 from 1952 in addition to the Fiat 615 N (N = Nafta = Diesel) and one year in Fiat Campagnola and Fiat. <P2-S13>  The somewhat weaker beast of burden was, with its 1.1 liter and 28/30 PS (at 4400 rpm) a little lame, but it had fully loaded a ton to move less weight, so was more economical. <P2-S14>  It is unclear whether the successor (from about 1963, as Fiat 615 N1) only with the 1.9 liter petrol engine (such as 615 B) was built, with a diesel engine. <SEP> <P3-S0> Volkswagen's VR6 engines, and the later VR5 variants, are a family of internal combustion engines, characterised by a narrow-angle (10.5° or 15°) V engine configuration. <P3-S1>  Developed by the manufacturer in the late 1980s, evolutions of these engines are still produced by them.