German diesel engine maker DEUTZ is reporting strong half-year results, which it says will help the firm to invest in research and development into future powertrain solutions. The company says it has seen a marked increase in new orders and revenue as well as a significant improvement in free cash flow, while it has also benefited substantially from the sale of its former manufacturing site in Cologne. The company says that new orders in the DEUTZ Group increased by 18.6% to €803 million for the half-year,