The 2021 Cadillac CT4 enters its second year as the luxury band's compact sedan offering. Standard equipment now includes SiriusXM 360 L satellite radio and wireless Apple CarPlay and Android Auto compatibility. The Teen Driver system gains a Buckle to Drive feature that delays starting up to 20 seconds when the driver's belt isn't fastened.

The optional Technology Package adds a 12-inch HD gauge cluster. The mid-level Premium Luxury trim gets a new Diamond Sky design package. Cadillac's SuperCruise semi-autonomous driving system is available on the AT4 for the first time.

The CT4 continues in four trim levels: Luxury, Premium Luxury, Sport, and V-Series. Pricing starts at $34,390 including destination and reaches $45,890 for the V-Series before options.

A turbocharged 2.0-liter four-cylinder engine is standard on the Luxury, Premium Luxury, and Sport. A 2.7-liter turbo four-cylinder is available on the Premium Luxury for $3,900. A high-output version of the 2.7-liter is exclusive to the V-Series.

The 2.0-liter runs with an eight-speed automatic transmission, while the 2.7-liter gets a 10-speed automatic.

All models start out with rear-wheel drive. All-wheel drive costs $2,000 with the base engine, and $3,200 with the 2.7-liter available on the Premium Luxury. Adding AWD to the V-Series costs just $500.

The Cadillac CT4 can seat five, but its interior dimensions suggest that four will be more comfortable. The trunk is on the small side at 10.7 cubic feet.

The entry-level Luxury comes with forward collision warning with pedestrian detection and automatic braking. While that's a key safety technology, it's the only one available.

The other trims provide rear parking sensors and access to three option groups. The Driver Awareness Plus Package ($800) includes blind-spot monitoring with rear cross-traffic alert, active lane keeping assist, a following distance indicator, and automatic high beams. Buyers can also add a Driver Assistance Package ($900) with adaptive cruise control, rear automatic emergency braking, and radar-enhanced front automatic braking. The $1,350 Technology Package throws in a 12-inch configurable gauge cluster, a head-up display, and a cabin air ionizer.

Finally, the SuperCruise semi-autonomous driving system ($3,100) is available on Premium Luxury models equipped with the 2.7-liter engine and every V-Series. All three of the preceding package must be in place to add SuperCruise.

The standard infotainment system for all trims offers an 8-inch touchscreen, eight speakers, SiriusXM 360 L and HD radio, wi-fi capability, and wireless Apple CarPlay and Android Auto capability.

The Sun and Sound Package ($2,200) for the Luxury trim includes a 14-speaker Bose surround-sound system, navigation, wireless device charging, and a sunroof. Elsewhere in the lineup, this bundle is called the Navigation and Bose Premium Audio Package because the sunroof isn't included – it's a $1,050 standalone option. The package costs $1,400 on the Premium Luxury and Sport, and just $500 on the V-Series.

The base CT4 comes with leatherette upholstery, a 12-way power driver seat and 8-way power passenger seat, remote start, proximity key access, paddle shifters, full LED exterior lighting, and 17-inch alloy wheels.

The Cold Weather Package adds heated front seats and an automatic heated steering wheel for $600.

The Premium Luxury carries a leather interior with 14-way power front seats with driver memory, ambient lighting, and an auto-dimming rearview mirror. Other upgrades include a universal home remote, automatic wipers, headlight tunnel detection, 18-inch wheels, and an auto-dimming driver side mirror.

The $1,200 Climate Package furnishes heated and ventilated front seats and the heated steering wheel. The new Diamond Sky Special Edition Package ($2,400) features a Diamond Sky Metallic exterior, matching upholstery with black accents, Brembo front brakes with blue calipers, unique wheels, aluminum console trim, and alloy pedals.

The Sports wear more aggressive body trim and nickel-finish wheels. The inside gets 18-way front sport seats, a performance steering wheel, and alloy pedals. Other standard equipment and option packages are shared with the Premium Luxury.

The V-Series builds on the Sport with genuine performance upgrades. The V-Series gets special suspension tuning, magnetic ride control (RWD only), a limited-slip rear differential, and a sport-tuned traction management system with launch control.

Compare CT4 Trims Side-By-Side