Propane	LNG	Gasoline	Diesel	Hydrogen	Methanol	Ethanol
Formula	C3H8	CH4	C8 H18	C12H26	H2	CH3OH	C2H5OH
Research Octane Number	112	130	91-98	N.A	N.A	112	111
Motor Octane Number	97	130	83-90	N.A	N.A	91	92
Cetane Number	5-10	-10	8-14	40-65	N.A	3	8
Density of Liquid Fuel(kg/lt)	0.509	0.421	0.746	0.808	0.0708	0.79	0.783
Density of Gas (kg/m3)	0.508	N.A	4.4		0.0838
Boiling Point (C)	-42	-162	27-240		-252.7
Lower Heating Value(kj/kg)	46,238	49,913	42,661	43,419	119,444	19,859	26,855
Energy Content (Volume)(kj/lt)	23,535	21,013	31,825	35,082	1930*	15,688	21,027
Energy Compared to Gasoline	74%	66%	100%	110%	6.06%	49%	66%
Energy Compared to Diesel	67%	60%	91%	100%	5.50%	45%	60%
Stoichometric A/F Ratio (mass)	15.7	17.3	14.7	15	34.3	6.5	9
Heat of Vaporization (kj/kg)	423	507	355	286	N.A	1186	842
Energy of Stoich. Mixture (Mj/m3)	3.79	3.58	3.91		3.58
Wobbe Number (Mj/m3)	74.7	48.2	N.A	N.A
Auto ignition Temperature (C)	450	450	220	225	585
Peak Flame Temperature (C)	1990	1790	1977	2054	2045
Spark Ignition Energy (mj)	0.305	0.29	0.24	0.24	0.02
Flammability Limits (vol %)	2.1-10.4		1.4-7.6	0.6-5.5	4-75
Detonation Limits (vol %)	3.4-35	6.3-13.5	1.1-3.3		18.3-59
Flame Spread Rate (m/s)	N.A	N.A	4-6	0.02-0.08
Max. Burning Velocity in NTP air (cm/s)	43-52	37.45	37.43
Specific Gravity at NTP (kg/m3)	1.52	0.55	2-4	4-6
Reid Vapor Pressure (psi)	N.A.		50-100	0.1-0.15
Diffusion Velocity in NTP air (cm/s)	~0.34	~0.51	~0.17		~2
Diffusion Coefficients in NTP air (cm2/s)	0.1	0.16	0.05		0.61
Quenching gap in TNP Air (mm)	1.78	2.03	2		0.64
Flame Visibility, relative	0.6	0.6	1	1
Flash Point (F)	N.A	-306		125

*At 3,500 PSI