| Sl. No. | Property | Hydrogen | Gasoline | Diesel |
| 1 | Formula | H2 | CnH1.8n | CnH1.8n |
| 2 | Auto-ignition temperature (˚K) | 858 | 530 - 730 | 530 |
| 3 | Minimum ignition energy (mJ) | 0.02 | 0.24 | --- |
| 4 | Flammability limits (volume % in air) | 4 - 75 | 1.4 - 7.6 | 0.7 - 5 |
| 5 | Stoichiometric air-fuel ratio on mass basis | 35 | 14.6 | 14.5 |
| 6 | Limits of flammability (equivalence ratio φ) | 0.1 - 7.1 | 0.7 - 3.8 | --- |
| 7 | Density (1 bar, 16˚C) | 0.084 | 750 | 820 |
| 8 | L. heating value (mJ/kg) | 120 | 43.9 | 42.5 |
| 9 | Flame speed (cm/s) | 265 - 325 | 37 - 43 | 30 |
| 10 | Quenching distance NTP air (cm) | 0 - 06 | 0.2 | --- |
| 11 | Diffusivity air (cm2/s) | 0.63 | 0.08 | --- |
| 12 | Octane number | 130 | 80 - 92 | 30 |
| 13 | Cetane number | --- | 40 - 55 | 13 - 17 |