I know everysays 354 C.I. but here is some script take from Allpar, I think the discrepency stems from the fact this is a metric engine, and you cannot get a true reading converting bore and stroke before you have convert CC's to cubic inches.
John Veatch wrote:
"Seeing all the hoopla surrounding the new Hemi and the previous speculation on whether its displacement was going to be either the nostalgic 354 or 383, I am amazed no one has made mention of what is probably the coolest coincidence of all. The actual production engine came in at 345 c.i.d. @ 345 hp, the exact same specs as the '57 DeSoto Adventurer 345/345 Hemi, the first standard engine to make the 1hp/ci mark (albeit the '56 300 optional HP engine had earlier accomplished the feat). Both preceded the much ballyhooed optional 283/283 hp '57 Corvette engine."
Specfications (in the 2003 Ram 2500)Pushrod-operated overhead valves, 16 valves, hydraulic lifters with roller followers
Sequential, multi-port, electronic, returnless fuel injection
Deep-skirt cast iron block with cross-bolted main bearing caps, aluminum alloy heads with hemispherical combustion chambers, 90 degree V-type, liquid cooled.
Compression Ratio: 9.6:1
Revised specifications - note greater power!Specifications are for the engine in the 2500 trucks.
Power (SAE net): 345 bhp (257 kW) @ 5,400 rpm
Torque (SAE Net): 375 lb.-ft. (508 Nom) @ 4,200 rpm
Displacement 345 or 353 cu. in* (5,654 cu. cm)
Bore x stroke 3.92 x 3.58 (99.5 x 90.9)
Valve system Pushrod-operated overhead valves, 16 valves, hydraulic lifters with roller followers
Fuel injection Sequential, multi-port, electronic, returnless
Construction Deep-skirt cast iron block with cross-bolted main bearing caps. Aluminum alloy heads with hemispherical combustion chambers
Max. engine speed 5,800 rpm
Fuel requirement Unleaded mid-grade, 89 octane (R+M)/2 - recommended, Unleaded regular, 87 octane (R+M)/2 - acceptable
Oil capacity 7 qt. (6.6L)
Coolant capacity 18.7 qt. (17.7L)
