Engine data 928 S4928GT

Engine type

Model year_

M28.42 1990,1991

M28.47 1990,199t

No. of cylinders

Bore

Stroke

Displacement (act.)

Compression ratio

Max. engine power,

80/1269/EEC

At engine speed

Max. torque,

80/1269/EEC

(Net Torque, SAE J1349)

At engine speed

Max. specific power,

DIN 70020

Fuel octane rating

Engine speed limitation by fuel cut-off

Idle speed

Engine weight (dry)

kW/HP 235/320 243/330

rpm 6000 6200

Nm/kpm 430/43.9 430/43.9

rpm 3000 4100

RON 95 Pu 95 Pu rpm 6600 6800

kg 264 264

Note: USA values in brackets.

Engine data GTS

Engine type Model year

M28.49/50 1992,1993

No. of cylinders

8

Bore

mm/in.

100 (3.94)

Stroke

mm/in.

85.9 (3.38)

Displacement (act.)

cm3/in.3

5397 (329.S

Compression ratio

10.4:1

Max. engine power,

80/1269/EEC

kW/HP

257/350

(Net Power, SAE J 1349)

kW/HP

257 (345)

At engine speed

rpm

5700

Max. torque,

80/1269/EEC

Nm/kpm

500/51

(Net Torque, SAE J1349)

Nm/lbft

500 (369)

at engine speed

rpm

4250

Max. specific power,

DIN 70020

kW/l(HP/l)

46.3/63

(SAE J 1349)

kW/l(HP/l)

46.3 (68.4)

Fuel octane rating

RON

98S+U

Engine speed limitation

by fuel cut-off

rpm

6600

Idle speed

rpm

675 ±25

Engine weight (dry)

kg

266

Technical data type 928 S4 engine type M 28.42

Engine design

Design

8-cyl. 4-stroke spark-ignition V-engine

Crankcase

2-piece light-alloy crankcase, without cy

linder liners

Crankshaft

Forged, 5 plain bearings

Connecting rods

Steel, sinter-forged

Pistons

Light-alloy, cast, contact surface

iron-coated

Camshaft

Cast, without bearing shells,

running in camshaft housing

Camshaft drive

Toothed belt and internal chain

Cylinder head

Light alloy

Valve arrangement

2 intake, 2 exhaust, suspended in V

Valve timing

2 overhead camshafts per bank of cylin

ders and hydraulic bucket tappets

Valve play

Self-adjusting (hydraulic)

Timing Intake opens

11 degr. after TDC

(1 mm stroke, Intake closes

36 degr. after BDC

zero play) Exhaust opens

17 degr. before BDC

Exhaust closes

2 degr. before TDC

Engine cooling

Closed coolant system

Engine lubrication

Forced oil circulation

with crescent pump

Oil filter

In full flow

Oil pressure at 4000 rpm

Appr. 5 bar overpressure,

at 80...100 °C oil temperature

Oil pressure indicators

Indicator lamp and pressure gauge

Oil consumption 1/1000 km

Up to 1.5

Exhaust system

Twin-pipe system throughout

3-way catalytic converters, 2-pipe sys

tem in center muffler and rear muffler

Exhaust emission control system

3-way catalytic converters and second

ary air injection

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