Engine Number/Engine Characteristics

WARNING: This page does not describe the selected car, but rather 12 other vehicles, including the 2017 Audi S5, 2016 Audi S5, 2016 Audi S4, 2015 Audi S5, and 2015 Audi S4. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

The engine number is only visible if the front engine cover is removed.

Fig 1: Locating Engine Code And Serial Number

Courtesy of AUDI OF AMERICA, LLC

The engine number ("engine code" and "serial number") is located at front on cylinder block, below the right cylinder head -arrow-.
Engine codes beginning with "C" are four-digit.
The first three digits of the engine code stand for displacement and the mechanical structure of the engine. They are stamped in the cylinder block, including the serial number.
The fourth digit represents the engine output and torque and is dependent on the engine control module.

NOTE:

The four digit engine code is on the type plate, vehicle data label and engine control module.

Codes		CAKA CCBA	CGWC CGXC	CHMB	CMUA	CTUB
Displacement	liter	2.995	2.995	2.995	2.995	2.995
Output	kW at RPM	245/5500 to 7000	245/5500 to 7000	200/4800 to 6500	200/4800 to 6500	245/5500 to 6500
Torque	Nm at RPM	440/2900 to 5300	440/2900 to 5300	400/2250 to 4250	400/2150 to 4780	440/2900 to 5300
Bore	diameter in mm	84.5	84.5	84.5	84.5	84.5
Stroke	mm	89.0	89.0	89.0	89.0	89.0
Compression ratio		10.5	10.5	10.5	10.5	10.5
RON	at least	95 ¹⁾	98 ²⁾	95 ¹⁾	95 ¹⁾	95 ¹⁾
Fuel injection and ignition system		Simos	Simos	Simos	Simos	Simos
Ignition sequence		1-4-3-6-2-5	1-4-3-6-2-5	1-4-3-6-2-5	1-4-3-6-2-5	1-4-3-6-2-5
Exhaust Gas Recirculation (EGR)		no	no	no	no	no
Turbocharger		Supercharger	Supercharger	Supercharger	Supercharger	Supercharger
Knock control		2 sensors	2 sensors	2 sensors	2 sensors	2 sensors
Charge air cooler		yes	yes	yes	yes	yes
Oxygen sensor regulation		2 sensors before catalytic converter 2 sensors after catalytic converter	2 sensors before catalytic converter 2 sensors after catalytic converter	2 sensors before catalytic converter 2 sensors after catalytic converter	2 sensors before catalytic converter 2 sensors after catalytic converter	2 sensors before catalytic converter 2 sensors after catalytic converter
Camshaft adjustment		Intake	Intake	Intake	Intake	Intake
Intake manifold change-over		yes	yes	yes	yes	yes
Secondary Air Injection (AIR) System		yes	yes	yes	yes	yes
Valve per cylinder		4	4	4	4	4
¹⁾ Regular unleaded RON 91 is also permitted, but performance will be reduced. ²⁾ Super unleaded RON 95 is also permitted, but performance will be reduced.