Rover V8 Compression Ratio

Rover V8 Compression Ratio. Post by eightofthem (andy) onsep 6, 2009 at 12:52pm. 131 rows the top row of the stamping shows the compression ratio (9.75:1).

Pistons - 109In V8 - 8.13:1 Compression Ratio - Find Land Rover Parts At Lr Workshop from www.lrworkshop.com

Range rovers were usually high compression 9:1 (ish), the land rover stage 1 was 8:1 or so. The compression ratio appears adjacent to the dip stick, and provided the pistons remain as originally fitted, then the cr will be 10.5 : 340 nm or 250 lb.ft @ 2600 rpm :

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(in a perfect world) with a maximum of 10% total. Dimensions the dimensions quoted are to design engineering specification with service limits where applicable.

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Ok for the 8.1 compression ratio motor. Some of the earlier v8's were nearer 10:1 and woulad need to run on super unleaded or with an octane booster to prevent pinking!

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Sal manufacturer's identifier (land rover uk) lt marque/model lt = discovery g class a = japan g = 100 inch m body style b = 5 door models 8 engine 1 = 4.0 v8 lc cat 2 = 4.0 v8 hc cat 3 = 4.0 lc non cat 8 = td5 engine egr/cat 9 = td5 engine egr/ non cat 7 transmission and steering 3 = rhd automatic gearbox 4 = lhd automatic gearbox 7 = rhd. The compression ratio is mainly altered by rover by selecting different pistons with larger or smaller dish volume in the piston.

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I have a late cross bolted and top hatted 4.6 engine. Slightly low for the 9.35 compression motor.

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With the introduction of the rover sd1 in 1976, the engine was improved with the 'rope' oil seals for the crankshaft ends replaced with lip seals, spark plug dimensions changed and the compression ratio lowered to 9.35:1. I calculate a compression ratio of about 8.2 with a deck height of 0.040 and the existing pistons.

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This engine produces a maximum power of 190 ps. The lower compression engines have less power but will be less strained and will run on lower octane fuel.

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Range rover engines for instance have quite a large piston dish volume to reduce the compression to 8.35:1 Would anyone know what sort of compression pressure you'd expect to see on a healthy 4.0 rover v8 (approx 10.25:1 c.r.).

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In range/land rover applications, compression ratio was 9.35:1 and power rated at approx. Sal manufacturer's identifier (land rover uk) lt marque/model lt = discovery g class a = japan g = 100 inch m body style b = 5 door models 8 engine 1 = 4.0 v8 lc cat 2 = 4.0 v8 hc cat 3 = 4.0 lc non cat 8 = td5 engine egr/cat 9 = td5 engine egr/ non cat 7 transmission and steering 3 = rhd automatic gearbox 4 = lhd automatic gearbox 7 = rhd.

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I have had my compression measured and its coming out at 9.9:1. Dimensions the dimensions quoted are to design engineering specification with service limits where applicable.

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With the introduction of the rover sd1 in 1976, the engine was improved with the 'rope' oil seals for the crankshaft ends replaced with lip seals, spark plug dimensions changed and the compression ratio lowered to 9.35:1. One for you clever chaps.

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131 rows the top row of the stamping shows the compression ratio (9.75:1). I have a late cross bolted and top hatted 4.6 engine.

(In A Perfect World) With A Maximum Of 10% Total.

Range rovers were usually high compression 9:1 (ish), the land rover stage 1 was 8:1 or so. This engine produces a maximum power of 190 ps. 131 rows the top row of the stamping shows the compression ratio (9.75:1).

185 Ps Or 182 Bhp Or 136 Kw @ 4750 Rpm :

Hi, in short 3.9 cams shouldnt affect the compression ratios as the cylinder swept volume remains the same and valves should still be closed on the conpression stroke, i believe the 3.9 cams either gave more valve lift than a 3.5 cam or held the valves open a slightly longer duration as the larger engine could digest more air and fuel, (there are probably people on here. I have been given a rover v8 engine with a ratio of 8.25.1 its from a. Dimensions the dimensions quoted are to design engineering specification with service limits where applicable.

Post By Eightofthem (Andy) Onsep 6, 2009 At 12:52Pm.

With the introduction of the rover sd1 in 1976, the engine was improved with the 'rope' oil seals for the crankshaft ends replaced with lip seals, spark plug dimensions changed and the compression ratio lowered to 9.35:1. The compression ratio appears adjacent to the dip stick, and provided the pistons remain as originally fitted, then the cr will be 10.5 : The compression ratio is above the serial number.

Well, The V8 Engine Used In The Rover Sd1 In The Mid 1980'S Was A 9.35:1 Compression Ratio And I Don't Think Landrover Retuned It Any More, Originally It Was Something Like 10.8:1.

To provide some background, in 1961,. The lower compression engines have less power but will be less strained and will run on lower octane fuel. The maximum compression reading will be 175 lbf/sq inch (12.5 kgf/ sq cm) have you taken any readings as yet?

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Would anyone know what sort of compression pressure you'd expect to see on a healthy 4.0 rover v8 (approx 10.25:1 c.r.). In range/land rover applications, compression ratio was 9.35:1 and power rated at approx. Rover v8 ( 0:18) sound clip of a 3.5 l rover v8 engine, as fitted to a 1979 range rover.