The 2007 Toyota Tundra lineup comes in five different setups. The Regular Cab offers only storage space behind the front seat, and either the 6.5-foot standard bed or the 8-foot long bed. The Double Cab features rear side doors, forward-hinged like on an SUV, and seats for as many as six; the Double Cab comes with the standard bed or the long bed. Then there's the CrewMax, with full-size rear side doors, and the short bed.

The base engine is a 236-hp 4.0-liter V6. Next up is a 271-hp 4.7-liter V8. At the top is a 381-hp 5.7-liter V8. The 4.0-liter and 4.7-liter engines come with a five-speed automatic, the larger V8 comes with a six-speed automatic. All have a manual gear-selection feature. Electronic, part-time, four-wheel drive is offered on V8-powered Tundras.

The base Tundra DX is a the workhorse edition and only comes as a Regular Cab. A fabric-upholstered, 40/20/40-split, bench seat, vinyl floor covering, column shift and manual-crank windows are standard. So is a four-speaker, AM/FM/CD stereo with auxiliary audio input. The manual air conditioning is dual-zone, though, and the steering wheel tilts. Toyota's unique, gas strut-boosted, tailgate assist is standard, too. Steel wheels wear P255/70R18 tires.

Options include a Cold Weather Package, with heavy duty battery and starter and heated, power outside mirrors; a Tow Package with integrated hitch, four-pin and seven-pin connectors, trailer brake controller connectors, supplemental transmission cooler and, on the 5.7-liter V8 models, manually extendable towing mirrors incorporating turn signals and running lights. The SR5 package includes chrome bumpers and grille surround; power windows, door locks and outside mirrors; cruise control; variable intermittent wipers, and upgraded upholstery fabric and carpet.

SR5 trim is available in all three cab configurations. The SR5 fabric front bench gets better quality upholstery and eight-way driver and four-way passenger adjustments, both manual. Other driver-assist and creature-comfort upgrades include power windows, central locking and outside mirrors; cruise control; keyless remote; two more speakers, for a total of six; a third power point; carpeted floor mats; and rear seat heater duct. Exterior trim is upgraded with chrome bumpers and a chrome grille. The V8 towing package is standard on the Long Bed. The multi-function mirrors come standard with the 5.7-liter V8.

Additional options include a JBL AM/FM/CD stereo with six-disc, in-dash changer, 10 speakers, Bluetooth and leather-trimmed steering wheel with redundant audio controls; DVD-based navigation system with backup camera; and running boards. The TRD Off-Road Package for an SR5 short bed V8 engines includes a specially tuned suspension with Bilstein shocks, P275/65R18 tires on unique, aluminum alloy wheels and fog lamps.

The Limited trim features leather-trimmed front bucket seats with seat heaters, 10-way power adjustable for the driver's side, four-way power adjustable for the passenger's side; floor-mounted shifter and center console; automatic dual-zone climate control; the JBL AM/FM/CD audio setup but with 12 speakers; tilt/telescope steering wheel; sliding rear glass; and auto-dim inside rearview mirror with compass and programmable garage/gate remote. Outside, the front bumper is color keyed, while the rear bumper remains chromed, as does the grille surround, although now the grille bars get chrome, too. The outside mirrors upgrade to chrome, heat, auto-dimming and integrated turn signals. Fog lamps, engine skid plate and bed-mounted, deck rail system with adjustable tie-down cleats are standard, too. P275/65R18 tires on aluminum alloy wheels are standard, P2275/55R20 on alloy wheels optional.

The CrewMax comes in SR5 or Limited trim. Features and options pretty much track those of the Double Cab, but with a few additions: a vertically sliding, power rear window; a slide-and-recline, three-passenger, rear bench seat; and an overhead console with map lights and swing-down cases for glasses and sundry items. CrewMax buyers get to choose one of two, mutually exclusive options, a power, tilt/slide moonroof, which deletes the overhead console, or a rear seat entertainment system with nine-inch, roof-mounted LCD (with side-mounted reading lights), rear seat audio controls and reading lights.

Safety features on all 2007 Tundras include frontal airbags for driver and front seat passenger (the latter with an off switch in regular cab models); roll-sensing, side curtain airbags, which can be de-sensitized to avoid inadvertent deployment while off-roading; and front seat-mounted side airbags. Four-wheel disc brakes with ABS, brake assist and electronic brake-force distribution are standard, as are electronic stability control with traction control and a limited slip differential.