A recently published article indicated that the MAN D08, D20 and D26 commercial vehicle engines are all based on a “common construction”. Does this mean that all of these engines will use the same SinterCast-CGI cylinder block?

Shareholder, name withheld

All car and truck companies try to maximise the commonality of their components in order to improve their economy of scale. While it is generally possible to commonise fuel delivery systems, hydraulic components, emissions assemblies and electronics over a wide range of engines, the cylinder block serves as the foundation of the engine and is therefore less flexible. The main criteria for the use of common cylinder blocks is that the engines must have the same centre-to-centre distance between the cylinder bores and the same number of cylinders. In the case of V-engines, the bank angle must also be the same.

In the present case, the MAN D08 is a family of 4 and 6 cylinder engines with 4.5-6.8 litre displacement and 150-225 horsepower. In contrast, the D20 and D26 engines are both 6-cylinder engines with a larger bore diameter, higher displacement (10.5 litres for the D20 and 12.4 litres for the D26) and higher horsepower (400-550 horsepower). While the differences between the D08 and the initial SinterCast-CGI D20 engines are too large to allow for a common cylinder block, the D26 engine will indeed be based on the D20 CGI cylinder block. As the D26 engines enter the market and the production volumes ramp-up, the combined D20 and D26 volume will provide “opportunities for future volume increases”, beyond the initial 20,000 cylinder block commitment, as indicated in the 18 August SinterCast-Tupy press release. As always, the task for SinterCast and Tupy is to provide a high quality and cost-effective CGI product and service in order to maximise our share of the production volume.