The modern MINI Cooper that looks most like the classic MINI is the MINI Cooper 3-Door Hardtop, particularly the models from the original launch in 2001 up to around 2013. The 3-Door Hardtop’s compact, boxy shape, round headlights, and short overhangs stay closest to the iconic look of the original classic MINIs from the 1960s and 70s.

Some details that give it the classic MINI vibe include:

1. Short Wheelbase: Like the original, the 3-Door has a compact, “wheels-at-the-corners” stance that adds to its agility and evokes the look of the original design.
2. Round Headlights: The iconic round headlights are a nod to the classic MINI, maintaining the instantly recognizable MINI “face.”
3. Classic Colors: British Racing Green with a white roof or red with white stripes are both available and are reminiscent of the vintage color schemes.

MINI also released a limited edition “MINI 60 Years Edition” in 2019 to celebrate the brand’s 60th anniversary, which had retro-inspired details like unique badging, vintage color schemes, and interior touches paying homage to the classic look.

If you’re after a new MINI that feels as classic as possible, the 3-Door Hardtop and, especially, any retro-themed special editions come closest to the spirit of the original.

Beyond the MINI Cooper 3-Door Hardtop, a few other models and special editions capture even more of the classic MINI's style:

1. MINI Cooper S 3-Door Hardtop (2001-2006 R53)

• The first generation of BMW's MINI revival (2001-2006) maintains the closest proportions to the classic MINI, especially in the “R53” MINI Cooper S model. This generation is particularly beloved by MINI enthusiasts for its resemblance to the original, thanks to its smaller dimensions compared to later models, lower stance, and raw driving feel.
• It has the famous “bulldog” stance of classic MINIs, with a longer hood but still keeping its charm and unmistakable MINI silhouette.

2. MINI Cooper 3-Door Hardtop (2021-present facelift)

• The latest version of the MINI Cooper 3-Door Hardtop has styling tweaks that give it a slightly retro look, especially with heritage-inspired details like Union Jack taillights and more rounded, retro-styled side mirrors and grille designs.

• Inside, MINI has incorporated modern updates while preserving retro design touches, such as the large circular infotainment system in the dash, which mimics the iconic central speedometer of classic MINIs.

3. MINI Cooper JCW GP Models

• The limited-production John Cooper Works GP models, such as the GP1 (2006), GP2 (2013), and GP3 (2020), were inspired by classic MINI racing heritage. While they include sporty elements like rear wings and aggressive bodywork, they’re a nod to the original MINI’s motorsport history. The raw, track-oriented spirit and performance-focused design recall the simplicity and purpose-built nature of the classic MINI Cooper S models of the 1960s.

4. Special Editions and Retro Packages

• MINI has released several limited-edition models that carry styling cues from the classic MINIs. The MINI 60 Years Edition in 2019, for example, featured British Racing Green paint, special logos, and a more retro-inspired interior and exterior detailing.
• The MINI Seven Edition and MINI Mayfair Edition were also designed with retro appeal, featuring two-tone paint schemes and checkered upholstery reminiscent of the original Minis.

5. MINI Cooper Electric (2020-present)

• The new MINI Cooper Electric brings an eco-friendly twist to the classic MINI look. Though it's modernized, it keeps the MINI 3-Door proportions and many design cues that maintain the MINI character, from the circular headlights to the compact, zippy feel—an essential aspect of classic MINI’s legacy.

Additional Details:

• Interior Details: Many modern MINI models keep details like toggle switches, retro-styled leather upholstery, and a central infotainment hub that echoes the spirit of the original speedometer.
• Paint and Roof Options: MINI still offers the classic contrasting roof colors—white or black on the body—keeping alive the visual charm of the original two-tone options.
• Handling and Driving Dynamics: Classic MINIs are legendary for their "go-kart" handling. Modern MINIs, especially the 3-Door Hardtop, carry this legacy with tight handling, making them one of the closest cars on the market to replicate that original MINI driving feel.

So, for the most classic look and feel, a recent MINI Cooper 3-Door Hardtop, especially in a heritage-inspired trim, combines the nostalgic essence of the classic MINI with modern conveniences.