question: What's the engine for the model model designation 97G00 and GVW of 2500/2.46 kg/ton?
answer: SELECT engine FROM table_20866024_2 WHERE gvw__kg_ton_ = "2500/2.46" AND model_designation = "97G00"
context: CREATE TABLE table_20866024_2 (engine VARCHAR, gvw__kg_ton_ VARCHAR, model_designation VARCHAR)