yes they told me that its the same but the st170 has a better bottom end (block) and a better gearbox. i was going to do a dta ecu so i will turbo it for sure. I'm looking for now a 250-300 bhp approximate will be more than good from a swap of a 1.8 turbo diesel 130 bhp. In future will upgrade for sure but better I learn to drive at that power for now and upgrade once I will be comfortable at that power.