What is the fine-grained topic of the following text: Powertrains (diesel and petrol) remain the same as before, the 2.1-litre 4-cyl turbocharged diesel engine is available in two states of tune – 134 BHP and 300 Nm in the 200d and 168 BHP and 350 Nm in the 220d. Only return the topic.
Specifications of diesel and petrol powertrains