I actually thought the B15 and the Sunny were the same but not the Almera. According to Freshalloy.com they are, but they never mention the Almera.
Both the Almera and B15 Sentra come with 1.8 liter engines, but the europe cars are different then Japanes & US Spec cars.
"Instead of direct-injection, European 1.8 gets a simple variable-valve timing at the intake valves to boost flexibility. That results in a peak torque of 117 lbft occurring from 2,400 rpm continuously to 4,800 rpm. Power, on the other hand, is as modest as 114 hp. Worst of all, this is already the range-topping engine for Almera - no 143 hp GTi anymore; no any 2-litre engine up to this moment. I think the Almera deserve at least Sentra’s 1.8, which received higher state of tune, hence 126 hp and 129 lbft. It would have been even better if it gets Sentra SE’s 145 hp 2-litre engine with dual variable-volume exhaust. "
Do you have any links to other sites that have information about the Almera? Any clubs or forums?