The Chevrolet Impala is a big, roomy sedan. While classified as a mid-size sedan, it's large for that class. The standard seats have fairly firm cushions and decent lumbar support compared to previous models. The back seat is roomy and comfortable for two adults or three kids. We found the Impala's V6 engines to be smooth and quiet. The four-speed automatic transmission is responsive and smooth. All Impalas come with a MacPherson-strut independent front suspension, with gas-charged struts and a stabilizer bar. he Impala's four-wheel disc brake system (vented in front, solid in the rear) has been designed for quiet operation, long pad life, and resistance to brake pulsation. The Chevrolet Impala is pleasing to drive, whether equipped with the 3.5-liter or 3.9-liter V6 engines. They are roomy, comfortable, promise good reliability and represent solid value for the money.