Engine Code Reference

VW Type 4 Engine Codes

411 / 412, Type 2 Bus (72+), Porsche 914/4 and Porsche 912E — Type 4 horizontally-opposed.

How to read the code

Look on the crankcase below the generator/alternator stand — code is one or two letters stamped ahead of the engine serial number.
1700, 1800 and 2000 cc Type 4 crankcases look very similar — the engine code is the only reliable way to tell them apart without measuring.
FI codes use Bosch D-Jetronic (early) or L-Jetronic (later); carb codes use twin Solex 34 PDSIT.
Porsche 914 and 912E share the Type 4 architecture but have unique cooling shrouds and induction.

Code	cc	bhp	Years	Application	Notes
W	1679	68	1968–69	VW 411 carb	Twin Solex 34 PDSIT carbs
X	1679	80	1969–72	VW 411E / 411LE	Bosch D-Jetronic FI
EA	1679	66	1972–73	Type 2 Bus (T2b) carb	Twin Solex 34 PDSIT, low-comp Bus tune
CA	1679	73–80	1972–73	Type 2 Bus FI (US)	Bosch D-Jetronic
CB	1679	66	1972–73	Type 2 Bus carb (RoW)	Twin Solex carbs
EC	1679	80	1970–71	Porsche 914/4 1.7	Bosch D-Jetronic
AP	1795	68	1974	Type 2 Bus carb	Twin Solex 34 PDSIT
AN	1795	67	1974	Type 2 Bus FI (US)	Bosch L-Jetronic
EB	1795	76	1973	VW 412 LE/LS FI	Bosch D-Jetronic
ED	1795	76	1974	VW 412 FI	Final 412 1.8 FI
AW	1795	76	1974	VW 412 carb (RoW)	Twin Solex 34 PDSIT
EA	1795	76	1974	Porsche 914/4 1.8	Bosch L-Jetronic (US) / Solex carbs (RoW)
W	1971	100	1973–75	Porsche 914/4 2.0	Bosch D-Jetronic — also code GA later
GA	1971	95	1975–76	Porsche 914/4 2.0 (late)	Bosch L-Jetronic, US emissions
EA	1971	86	1976	Porsche 912E (US only)	Bosch L-Jetronic, 912E one-year-only
GD	1971	70	1976–79	Type 2 Bus FI (US)	Bosch L-Jetronic, catalyst
GE	1971	70	1976–79	Type 2 Bus FI (US Cal.)	Bosch L-Jetronic, California spec
CJ	1971	70	1976–79	Type 2 Bus FI (US 49-state)	Bosch L-Jetronic, hydraulic lifters
GC	1971	70	1978–79	Type 2 Bus (Cal. emissions)	Bosch L-Jetronic

Sources: VW Type 4 factory parts microfiche, Porsche 914 / 912E workshop manuals and the Bentley Volkswagen Bus 1968-79 official service manual. Code 'W' and 'EA' were re-used across years and applications — always cross-reference the serial range.

Power figures are factory-quoted SAE/DIN bhp at the listed market. Many codes were used across multiple model years and markets — always cross-reference the engine number, serial range and the M-plate before ordering parts.