A variable induction system enhances low-speed torque, improves fuel consumption and helps with emission control.
V6/4-valve head cross-section showing cross-bank valve actuation.
Volkswagen's new V5 is similar.
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Volkswagen released a new V6 engine in 1999; a development of the
VR6.
The main change is the adoption of a 4-valve cylinder head
with valves operated by two camshafts, the inner pair
operated by the camshaft of the opposite bank.
A variable induction system enhances low-speed torque, improves fuel consumption and helps with emission control. |
V6/4-valve head cross-section showing cross-bank valve actuation. Volkswagen's new V5 is similar. |
Volkswagen's older V5 was based on the original VR6 engine with 2 valves/cylinder. Either V5 is basically the V6 with one cylinder lopped off at the chain-drive end, resulting in 3 cylinders in the front bank and 2 cylinders in the rear bank for transverse installations. Other changes include a different crankshaft for balanced operation and the addition of a variable-geometry intake manifold with the original V5. The new V6 is equipped with a variable-geometry intake manifold. (See below).
The revised V5, based on the current V6 was introduced in 2000, producing almost as much power (125kW compared to 128kW) and more, wider torque than the old VR6.
V5 (110kW) in Golf |
V5 (125kW) in New Beetle |
V6 in Golf |
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| V6/4-valve head showing valves | V6/4-valve head showing camshafts |
| Engine | V5 110kW | V5 125kW | V6 150kW |
|---|---|---|---|
| Material cylinder head engine block |
Aluminium Gray cast iron casting |
||
| Bore/Stroke [mm] | 81.0 / 90.2 | ||
| Effective displacement [cm³] | 2324 | 2324 | 2792 |
| Valves per cylinder drive |
2 parallel direct bucket-follower |
4 at an angle/indirect, roller cam followers |
|
| Number of camshafts Drive configuration |
2 at the top of the cyl. head with chain |
||
| Crankshaft throw in degrees | 144 | 120 | |
| Number of crankshaft bearings | 6 | 7 | |
| Compression [:1] | 10.1 | 10.8 | 10.75 |
| Mixture preparation | Electronic multi-point port injection | ||
| Ignition system | Mapped characteristic | Mapped single spark coils |
Distributorless |
| Emission control system | catalytic converter, lambda control | ||
| Power output [kW (bhp) at rpm] | 110 (150) / 6000 | 125 (170) / 6200 | 150 (204) / 6200 |
| Max. torque [Nm at rpm] | 205/ 3200 | 220/ 3300 | 265/ 4000 |
| Alternator (A)/battery (A) (Ah) | 70 / 280 (60) | - / - (60) | 120 / 340 (70) |
| Exhaust emission classification | D3 | Euro IV | |
