stevecarmad Posted December 25, 2008 Share Posted December 25, 2008 Am I correct in saying 8v engines have a greater torque up to approx 4000RPM where a 16v performance would really kick in? If that is correct, then would I be correct in saying a 16v car engine would need great RPM/Torque to counteract an 8v car which had a better power to weight ratio and more torque within the lower band of RPM? Quote Link to comment Share on other sites More sharing options...
sobaka Posted January 7, 2009 Share Posted January 7, 2009 Am I correct in saying 8v engines have a greater torque up to approx 4000RPM where a 16v performance would really kick in?If that is correct, then would I be correct in saying a 16v car engine would need great RPM/Torque to counteract an 8v car which had a better power to weight ratio and more torque within the lower band of RPM? Interesting your observations. I would allow myself to disagree. The multi valve engines allow much better flow of intake and exhaust. They also favour the spark plug being at the top of the cylinder, which ford has. A 16 valve engine allows get higher power easier, but you talk about torque. Well it is also the case. Here is the comparison taken with similar 1.8 engines (this is probably not noticeable on a smaller engine and one can talk about additional horses not torque) The following figures are torque in ft/lbs RPM 8v 16v 1500 45 56 2000 68 91 2500 101 130 3000 112 133 3500 112 129 4000 111 132 4500 126 140 5000 129 136 5500 130 134 6000 126 126 6500 112 118 7000 99 108 Quote Link to comment Share on other sites More sharing options...
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