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Originally Posted by 1100D  But then did 608 have a different engine from the 407?
Even now 712 ex (is the most probably the DICOR-ised 407 engine) but 410 EX?
Just guessing though 709 could be turbocharged 407 engine. |
608 engine was the six cylinder version of the 407 engine, with a cubic capacity of about 4.4 litres. Bore and stroke were identical: 97 MM X 100 MM.
4.4 litre engine was too big for an LCV and so 608 failed miserably in the market. It had the load carrying capability of an LCV but the fuel consumption of a MCV!
608 model (together with the engine) was soon phased out and replaced by 609 which was soon designated 709 since Leyland was launching Iveco LCV with the model designated as 709. Tata 609/709 had a 3.8 litre 4 cylinder engine that was derived from the bigger Tata 697 engine (that did duty on Tata's bigger trucks) simply by slicing off two cylinders. Hence the identical bore and stroke figures: 97 MM X 128 MM, compared to 697.
712 EX engine is different from 407 engine. 712 EX's engine is simply the Euro-III compliant version of 709's earlier engine. It is not DICOR but nevertheless uses a new fuel pump and has several other improvements, leading to improved power, torque as well increased intervals between oil changes.
For ensuring Euro-III compliance, the 407 engine also got the same treatment as the 709 engine and in the process its power increased from 70 to 100, besides other improvements.