Which one is faster 35i vs 35d

[JCL]

Barbja, interesting comments, but you are comparing your 35d to your E53. The comparison was to the 35i in the E70.

I wouldn't necessarily call what you are experiencing turbo lag, as it is just a fact that the diesel won't make any power down low until you have the turbos spinning. The 35i has torque at 1200 rpm or so, while the 35d is building to around 1700 rpm (from memory). Naturally aspirated diesels last a long time, but what they don't do is make much power. It is diesel lag as much as it is turbo lag. For your driving style, you may have preferred the 35i, which gets more torque lower down than the diesel does. I think the 35d could be very effective in traffic, but it would require a slightly different driving style.

Your Volvo was a very low pressure turbo, so the turbo was always spinning. That turbo was designed for a different purpose than ultimate horsepower (like the Volvo T5 was).