The year 2001 wasn't just a model change; it was Audi’s statement of intent to fully compete with the BMW 3 Series and Mercedes-Benz C-Class in the premium segment. Audi A4 (B6) 8E - Википедия

Ranging from the entry-level 1.6L (102 hp) to the performance-oriented 3.0L V6 (220 hp) . The 1.8T (150–190 hp) remains a fan favorite for its balance of power and tuning potential.

Highly efficient options like the 1.9 TDI (100–130 hp) and the powerful 2.5 V6 TDI (155–180 hp) .