Ade,
Mercedes use the Renault 1.3 tce turbo petrol engines. As does Dacia & Nissan. It comes in various powered versions depending on the manufacturer, but broadly speaking 115, 140, 160hp.
They do not use the PSA (Peugeot Citroen) 1.2 Puretech engine. Its used by Opel/Vauxhall, Citroen and Peugeot.
The PSA Puretech Inline-three gasoline engines:
EB0 — 1.0 L (988.9 cc) Euro 5 50 kW
EB2 — 1.2 L (1,199.9 cc) Euro 6 61 kW
EB2DT — 1.2 L (1,199.9 cc) turbo Euro 6 81 kW
EB2DTS — 1.2 L (1,199.9 cc) turbo Euro 6 96 kW
EB2ADTS — 1.2 L (1,199.9 cc) turbo Euro 6 100 kW
EB2ADTX — 1.2 L (1,199.9 cc) turbo Euro 6 115 kW
But yes, most modern turbocharged 1.0 engines will leave the old Vag 1.4 85/95hp engine struggling in its wake. Wife had a 1.4 Roomster, it was ok, but no firebrand.
In life, it's not who you know that's important, it's how your wife found out.