Table 4.

Temperature difference vs. RPM Comparison of both engines.

S No	Temp of the Upper Plate	Temp of the Lower Plate	Temp Diff	Performance of Stirling Engine				Performance of Stirnol Engine
				Al	Cu	Brass	Bronze	Al	Cu	Brass	Bronze
	(°C)			RPM				RPM
1	25	45	20	220	355	140	82	228	365	145	85
2	25	50	25	235	372	150	88	245	390	158	92
3	25	55	30	248	400	158	92	259	415	165	98
4	25	60	35	262	422	168	98	274	440	175	102