🏷️ Basic Information

Make:

BMW

Model:

328 Roadster

Chassis Code:

Likely a variation of the 328 or a pre-war roadster designation. Specific code not provided, but implies a classic BMW model.

Engine Code:

Referenced as '35 4 cylinders', indicating a 4-cylinder engine of approximately 3.5 liters (this is a very large displacement for a 4-cylinder, suggesting a possible interpretation error in the source or a very unique engine for the era).

Model Generation:

Pre-World War II era (implied by '1935 roadster')

👋 Introduction

Market Position:

Niche audio asset for automotive enthusiasts, sound designers, and historical vehicle researchers seeking authentic vintage BMW engine sounds.

Target Audience:

Sound designers, music producers, automotive historians, BMW enthusiasts, and creators working with vintage automotive audio.

Competitive Analysis:

Offers authentic, royalty-free pre-war BMW engine sounds, distinguishing it from generic engine sound libraries. Cooperation with sound-pool24 suggests a focus on high-quality audio production.

Key Features:

Authentic 1935 BMW Roadster engine sounds, 4-cylinder engine depiction, royalty-free license, high-quality WAV format, digital download, midi compatible (implied by 'midi wav').

Quality Assurance:

High quality WAV sound file, suggesting professional recording and mastering standards.

📋 Manual Details

File Format:

WAV

Download Type:

Digital Download

Midi Wav Cooperation:

Indicates potential for MIDI mapping or use in conjunction with MIDI data, enhancing its utility for music production and sound synthesis.

Audio Quality:

High quality WAV, suitable for professional use in film, game development, or automotive sound libraries.

Audio Content:

Engine starting, running sounds (dry start, brief running) of a 1935 BMW Roadster with a 4-cylinder engine.

Page Count:

Not Applicable (audio file)

Manual Type:

Sound Sample / Audio Archive

Language:

N/A (audio data)

License Reference:

hhs00421 wav download. Specifies the license under which the audio file can be used (likely royalty-free for specified uses).

📖 Manual Coverage

Audio Systems:

Engine acoustics, exhaust notes, starting motor sounds.

Engine Audio:

Focuses on the auditory signature of the 4-cylinder engine, including startup noise, idle quality, and brief running sound.

Audio Capture Procedures:

Recording of engine start and brief running cycles in a dry condition.

Sound Recording:

Details the process of capturing engine sounds for various applications (e.g., sound design, historical archives).

Technical Depth:

Focused on the auditory characteristics of the vehicle's powertrain, providing a qualitative representation of its operational sound.

Audio Analysis:

Provides raw audio data that can be analyzed for engine RPM, load conditions, and mechanical health indicators based on sound.

📊 Manual Specifications

File Format Details:

WAV (Waveform Audio File Format), high quality, royalty-free.

Print Quality:

Not Applicable (digital audio file)

Binding Type:

Not Applicable (digital audio file)

Paper Type:

Not Applicable (digital audio file)

⚙️ Engine Specifications

Engine Type:

Inline 4-cylinder

Engine Displacement:

Approximately 3.5 Liters (Based on '35 4 cylinders'. Note: This is unusually large for a 1930s 4-cylinder. It's possible '35' refers to a model series or a different measurement.)

Engine Designation:

Pre-War BMW 4-cylinder OHV (Overhead Valve) likely, typical for the era.

Valve Train:

Likely Overhead Valve (OHV) or possibly early Overhead Cam (OHC) depending on the specific engine variant associated with the 35 4-cylinder designation.

Bore Stroke Estimate:

For a hypothetical 3.5L 4-cylinder, bore might be around 90-95mm and stroke 90-97mm to achieve this displacement.

Horsepower Estimate:

Estimated 70-80 HP for a 3.5L 4-cylinder of that era, though specific output varied significantly with tuning and exact displacement.

Torque Estimate:

Estimated 140-160 lb-ft, again subject to engine specifics.

Engine Layout:

Inline 4-cylinder

Fuel Delivery:

Likely carburetor-fed, possibly dual Solex or Zenith carburetors, common for BMWs of this period.

Fuel Type:

Gasoline (Petrol)

Cooling Type:

Water-cooled, likely with a mechanically driven fan.

Ignition Type:

Distributor-based ignition system, likely with coil and spark plugs.

🔧 Transmission

Transmission Type:

Likely a 4-speed manual transmission (synchromesh on higher gears may have been optional or standard depending on the specific 328 variant).

Transmission Features:

Column or floor-mounted shifter, robust construction for the era.

📐 Dimensions

Body Style:

2-door Roadster (Open-top sportscar)

Wheelbase Estimate:

Approx. 2,300 - 2,500 mm (90-98 inches) for a typical BMW roadster of this era.

Track Width Estimate:

Front: Approx. 1,250 mm (49 inches), Rear: Approx. 1,275 mm (50 inches).

Length Estimate:

Approx. 3,800 - 4,100 mm (150-161 inches).

Width Estimate:

Approx. 1,500 - 1,600 mm (59-63 inches).

Height Estimate:

Approx. 1,250 - 1,350 mm (49-53 inches) to the top of the body, without a windshield/top.

Curb Weight Estimate:

Approximately 900-1100 kg (2000-2400 lbs) for a vehicle of this type and era.

🛡️ Safety Features

Passive Safety Features:

Basic chassis structure, minimal passive safety features by modern standards. Emphasis on driver control and robust mechanicals.

Active Safety Features:

Effective braking system for its time (likely drum brakes on all wheels), precise steering, good weight distribution contributing to handling. Driver skill was the primary active safety system.

💡 Technology Features

Infotainment Systems:

Not applicable. Basic radio (if equipped) would be the extent of 'infotainment'.

Dashboard Features:

Minimal dashboard: Speedometer, tachometer (if fitted), oil pressure gauge, ammeter, temperature gauge, ignition switch. Likely an analog setup.

Driver Assistance Features:

None by modern standards. Driver input and vehicle handling skills were paramount.

Connectivity Features:

Not applicable.

🔧 Maintenance

Service Intervals General:

Given the age, maintenance would have been frequent. Oil changes likely every 1,000-2,000 miles. Ignition points, carburetor adjustments, and valve adjustments would be routine. Cooling system service (flushing) annually.

Spark Plug Maintenance:

Regular cleaning and gap adjustment of spark plugs would be required, likely every few thousand miles.

Engine Oil Specification:

SAE 30 or SAE 40 monograde oil (non-detergent likely preferred for vintage engines), or a period-appropriate multi-grade if available. Modern oil viscosity may need careful selection. Oil filter: Periodically, oil bath or element type. Capacity: Approx. 4-5 liters.

Coolant Specification:

Water with anti-corrosion additives. Antifreeze would have been used in colder climates. Capacity: Approx. 8-10 liters.

Transmission Fluid Specification:

Gear oil, likely SAE 90 or SAE 140. Capacity: Approx. 1.5-2 liters.

Brake Fluid Specification:

Likely mineral oil or early DOT 3 hydraulic fluid (if hydraulic brakes were used, many earlier cars had cable or rod actuated). Specific type critical for brake system integrity.

Gearbox Oil Type:

EP (Extreme Pressure) gear oil SAE 90 or 140. Needs to be compatible with early gearbox materials.

Common Issues Vintage:

Carburetor tuning, ignition system maintenance (points, condenser), oil leaks, cooling system overheating due to radiator efficiency, clutch wear, limited steering precision, brake fade, chassis flex.

Engine Performance Issues:

Potential for carbon buildup, valve seat wear, and timing chain stretch over long service life.

Ignition Points Example:

Part numbers are highly specific and rare for this era. Would require cross-referencing with vintage BMW parts suppliers. Example: Bosch or Marelli points for similar engines.

Oil Filter Example:

May be a canister type with a separate filter element or an oil bath system. Exact part numbers are model-specific and often sourced from specialist suppliers.

📚 Vehicle History

Brand Heritage:

BMW, founded in 1916, has a long history of producing high-quality engines and performance vehicles. Known for 'The Ultimate Driving Machine' slogan originating later, but the spirit of performance was present early on.

Model Evolution Context:

The 1930s saw BMW producing iconic models like the 303, 309, 315, 319, and the highly successful 328. The 328, introduced in 1936, was a revolutionary sports car for its time, renowned for its advanced chassis and inline-six engine (though this sound file indicates a 4-cylinder, possibly a different model or a specific variant).

Historical Significance:

BMW's early roadsters were known for their elegant styling and sporting prowess, laying the groundwork for BMW's future reputation in performance motoring.

Production Period:

1935 indicates a model or variant produced around this year. The broader 328 series production was from 1936 to 1940.

Manufacturing Location:

Eisenach, Germany

🏆 Awards & Recognition

Historical Recognitions:

The BMW 328 is widely recognized as one of the most significant sports cars of the 1930s, winning numerous races including the Mille Miglia and the 24 Hours of Le Mans (in its class). Its advanced engineering and performance set benchmarks for the era.

Contemporary Ratings:

Praised by automotive journalists of the time for its excellent handling, powerful engine (relative to competition), and advanced chassis design. Its performance was highly competitive against rivals like Mercedes-Benz and Alfa Romeo.