In the United States Volkswagen's are equipped with a 2.5 L, inline 5 cylinder, natural aspirated, petrol engine. The best and easiest way to describe it, is by having the fuel consumption of a six and the performance of a four cylinder. For example the smaller displacement but more advanced 2.0 TFSI (http://allaboutdieselz.blogspot.ro/2015/11/20-tfsi.html) is outperforming it. If someone is complaining about that this wasn't a fair comparison, here is another example, this time with a natural aspirated, 5 cylinder, in-house petrol engine from the past: the 2.3 L VR5 which was introduced in 1997 is having the exact same performance figures as a new 2.5, but it's 200 cm3 smaller + it's almost a twenty years old engine. What I'm trying to highlight is that Volkswagen is selling for the U.S. an outdated engine for some reason, from which the modern benefits of a VW engine are mostly missing, such as the FSI (fuel stratified ignition) system. You got nothing to loose even if you're choosing a 2.0 CR TDI over it; 140 & 170 HP versions are available which are having 320 NM (236 lb-ft)/350 NM (258 lb-ft) of torque available from a very low 1750 - 2500 rpm. Fuel economy is also improved in case of the TDI, they can easily return 50 mpg in normal driving conditions.
2.5 L, 110 HP — 1991–1995 Volkswagen Eurovan
ID code - BGP, BGQ, BPR, BPS
2.5 L, 150 HP — 2005 – present
ID code - CBT, CBU
2.5 L, 170 HP — 2007 – present
-Engine displacement & engine configuration:
2480 cm3 (151.3 cu in) inline 5 cylinder engine; bore x stroke: 82.5 by 92.8 mm (3.25 in × 3.65 in), stroke ratio: 0.89:1 - undersquare/long-stroke, 496.1 cm3 per cylinder
-Cylinder block & crankcase:
GJL250 grey cast iron; two-part oil sump, die-forged steel crankshaft with six main bearings, water---cooled oil cooler:
-Cylinder head & valvetrain:
cast aluminium alloy; four valves per cylinder, 20 valves total, low friction roller finger cam followers with automatic hydraulic valve clearance compensation, chain-driven (relay method, using two simplex roller chains) double overhead camshaft (DOHC), variable intake valve timing
-Aspiration:
cast aluminium intake manifold, single throttle body with electronically controlled 'drive by wire' throttle butterfly valve
-Fuel system:
common rail multi-point electronic sequential indirect fuel injection with five intake manifold-sited --fuel injectors:
-Ignition system & engine management:
five individual direct-acting single spark coils with longlife spark plugs, Bosch Motronic engine control unit (ECU), secondary air injection during cold start phase to reduce emissions, single knock sensor
-Exhaust system:
one-piece cast iron 5 into 1 exhaust manifold, ceramic catalytic converter, two heated oxygen sensors (three when equipped with California emissions) for permanent lambda control.
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